July 15, 2026
Epilepsy Currents - Episode 12- "Drugs, Diets, and DEEs — Add-on Ketogenic Diet versus Antiseizure Medications Alone in Children with Developmental and Epileptic Encephalopathies"
<p><span style="font-size: 12pt;">Join Dr.Marawar in a conversation with <span style="font-family: Arial, sans-serif;">Dr. Chalongchai Phitsanuwong</span> and <span style= "font-family: Arial, sans-serif;">Dr. Priyamvada Tatachar</span> as they discuss the article, <strong>"<span style= "font-family: Arial, sans-serif;">Add-on ketogenic diet versus antiseizure medications alone in children with developmental and epileptic encephalopathies: a prospective comparative cohort study</span>"</strong> and its accompanying <span style= "line-height: 115%; font-family: Aptos, sans-serif;">Epilepsy Currents commentary</span> <strong><span style= "line-height: 115%; font-family: Aptos, sans-serif;">"Drugs, Diets, and DEEs: A Comparative Review of Medical and Dietary Treatments in Developmental and Epileptic Encephalopathies". </span></strong></span></p> <p><span style="font-size: 12pt;"><span style= "line-height: 115%; font-family: Aptos, sans-serif;">Click <a href= "https://journals.sagepub.com/doi/full/10.1177/15357597261433562">here</a> to read the article.</span></span></p> <p><span style="font-size: 12pt;"><span style= "line-height: 115%; font-family: Aptos, sans-serif;">This podcast was sponsored by</span> <span style= "line-height: 115%; font-family: Aptos, sans-serif;"><a href= "https://www.ucbcompass.com">UCB</a>.</span></span></p> <p><span style="font-size: 12pt;"><span style= "line-height: 115%; font-family: Aptos, sans-serif;"><img src= "//assets.libsyn.com/show/412622/UCB_LOGO_TAG.jpg" alt="" width= "300" height="97" /></span></span></p> <p class="MsoNormal"><span style="font-size: 12pt;">We'd like to acknowledge Epilepsy Currents podcast editor Dr. Adriana Bermeo-Ovalle, contributing editor Dr. Rohit Marawar, and the team at Sage.</span></p> <hr /> <p class="MsoNormal" style= "mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal;"> <span style="font-size: 12pt;">This episode covers a 2025 Frontiers in Neurology study by Hu et al. and its accompanying Epilepsy Currents commentary on ketogenic diet therapy for developmental and epileptic encephalopathies (DEEs). Host Dr. Rohit Marawar speaks with Dr. Chalongchai Phitsanuwong and Dr. Priyamvada Tatachar about the study's findings that add-on ketogenic diet nearly doubled seizure-freedom rates versus medication adjustment alone, and produced meaningfully better developmental/cognitive outcomes. They discuss the rationale for earlier diet initiation, practical implementation (patient evaluation, dietician-led clinics, monitoring), manageable side effects, the search for response biomarkers, referral pathways for general neurologists, and the future of DEE treatment moving toward genetically targeted therapies alongside continued diet use.</span></p> <p><span style="font-size: 12pt;"><strong>Key takeaways:</strong></span></p> <p style= "margin-left: .5in; text-indent: -.25in; mso-list: l0 level1 lfo1; tab-stops: list .5in;"> <span style="font-size: 12pt;"> <!-- [if !supportLists]--><span style= "mso-list: Ignore;">1.<span style= "font-style: normal; font-variant: normal; font-size-adjust: none; font-language-override: normal; font-kerning: auto; font-optical-sizing: auto; font-feature-settings: normal; font-variation-settings: normal; font-weight: normal; font-stretch: normal; line-height: normal; font-family: 'Times New Roman';"> </span></span> Ketogenic diet outperformed medication adjustment alone: ~50% seizure response rate vs. ~29%, and ~20% seizure-free vs. ~10% (RR 1.73 for response, RR 1.9 for seizure freedom), consistent with prior literature (40-60% response, 10-30% freedom in DEEs).</span></p> <p style= "margin-left: .5in; text-indent: -.25in; mso-list: l0 level1 lfo1; tab-stops: list .5in;"> <span style="font-size: 12pt;"> <!-- [if !supportLists]--><span style= "mso-list: Ignore;">2.<span style= "font-style: normal; font-variant: normal; font-size-adjust: none; font-language-override: normal; font-kerning: auto; font-optical-sizing: auto; font-feature-settings: normal; font-variation-settings: normal; font-weight: normal; font-stretch: normal; line-height: normal; font-family: 'Times New Roman';"> </span></span> <!--[endif]-->Developmental gains, not just seizure control, may be the more striking finding: 36% vs. 5% showed developmental improvement on formal assessment, occurring even without medication changes, suggesting the diet has an intrinsic neuroprotective effect independent of seizure reduction.</span></p> <p style= "margin-left: .5in; text-indent: -.25in; mso-list: l0 level1 lfo1; tab-stops: list .5in;"> <span style="font-size: 12pt;"> <!-- [if !supportLists]--><span style= "mso-list: Ignore;">3.<span style= "font-style: normal; font-variant: normal; font-size-adjust: none; font-language-override: normal; font-kerning: auto; font-optical-sizing: auto; font-feature-settings: normal; font-variation-settings: normal; font-weight: normal; font-stretch: normal; line-height: normal; font-family: 'Times New Roman';"> </span></span> <!--[endif]-->Both experts argue for earlier initiation of ketogenic diet, especially in syndromes like epilepsy with myoclonic-atonic seizures (Doose syndrome, 79% response rate) and infantile epileptic spasms, rather than reserving it as a last resort after drug resistance and developmental regression are already established.</span></p> <p style= "margin-left: .5in; text-indent: -.25in; mso-list: l0 level1 lfo1; tab-stops: list .5in;"> <span style="font-size: 12pt;"> <!-- [if !supportLists]--><span style= "mso-list: Ignore;">4.<span style= "font-style: normal; font-variant: normal; font-size-adjust: none; font-language-override: normal; font-kerning: auto; font-optical-sizing: auto; font-feature-settings: normal; font-variation-settings: normal; font-weight: normal; font-stretch: normal; line-height: normal; font-family: 'Times New Roman';"> </span></span> <!--[endif]-->Side effects (mostly GI, constipation, "keto flu") are generally mild and manageable with proper monitoring (renal, bone health, lipids, micronutrients), and only ~3% discontinued therapy in the study; dedicated multidisciplinary keto clinics significantly improve feasibility and adherence.</span></p> <p style= "margin-left: .5in; text-indent: -.25in; mso-list: l0 level1 lfo1; tab-stops: list .5in;"> <span style="font-size: 12pt;"> <!-- [if !supportLists]--><span style= "mso-list: Ignore;">5.<span style= "font-style: normal; font-variant: normal; font-size-adjust: none; font-language-override: normal; font-kerning: auto; font-optical-sizing: auto; font-feature-settings: normal; font-variation-settings: normal; font-weight: normal; font-stretch: normal; line-height: normal; font-family: 'Times New Roman';"> </span></span> <!--[endif]-->No validated biomarker yet predicts individual response to the diet (early signals around acetylcarnitine levels), but resources exist for clinicians to start a program, including the Charlie Foundation, Matthew's Friends Foundation, the International Neurological Ketogenic Diet Society, and ILAE regional clinic listings.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"> <!-- [if gte vml 1]><v:shapetype id="_x0000_t32" coordsize="21600,21600" o:spt="32" o:oned="t" path="m,l21600,21600e" filled="f"> <v:path arrowok="t" fillok="f" o:connecttype="none"/> <o:lock v:ext="edit" shapetype="t"/> </v:shapetype><v:shape id="_x0000_s1026" type="#_x0000_t32" style='position:absolute; margin-left:-15.75pt;margin-top:-5.35pt;width:468pt;height:.75pt;z-index:251658240' o:connectortype="straight"/><v:shape id="_x0000_s1027" type="#_x0000_t32" style='position:absolute;margin-left:-51pt;margin-top:15.15pt;width:539.25pt; height:3pt;z-index:251659264' o:connectortype="straight"/><![endif]--><!-- [if !vml]--></span></p> <p class="MsoNormal"> </p> <hr /> <p class="MsoNormal" style= "mso-margin-top-alt: auto; mso-margin-bottom-alt: auto; line-height: normal;"> </p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"><strong><span style= "font-family: 'Arial',sans-serif; color: #dc7d3e; mso-font-kerning: 0pt;"> Dr. Rohit Marawar (Host):</span></strong> <span style= "font-family: 'Arial',sans-serif; mso-font-kerning: 0pt;">Imagine a child whose first year of life is measured not in milestones, but in seizures, dozens a day, while medication after medication is tried and falls short, and development quietly regresses.</span></span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-family: Arial, sans-serif; font-size: 12pt;">For children with developmental and epileptic encephalopathies, this is an all too common story. But what if one of our oldest therapies, a carefully formulated diet, could change not just the seizures, but the trajectory of a child's development?</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style= "font-family: Arial, sans-serif; font-size: 12pt;"><span style= "mso-spacerun: yes;"> </span>Welcome to the Epilepsy Currents podcast, the podcast for Epilepsy Currents Journal, exploring the latest research and expert commentaries from the world of epilepsy. UCB is the proud sponsor of this episode, Episode <u>Number</u> 12 of Epilepsy Currents podcast. I'm your host and associate editor for the podcast, Rohit Marawar.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style= "font-family: Arial, sans-serif; font-size: 12pt;">Today, we are discussing a prospective comparative cohort study by Hu and colleagues, published in Frontiers in Neurology in 2025, and the accompanying Epilepsy Currents commentary, Drugs, Diets, and DEEs to help us unpack what this means for clinical practice. We are joined by two expert voices in pediatric epilepsy.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style= "font-family: Arial, sans-serif; font-size: 12pt;"><span style= "mso-spacerun: yes;"> </span>First is Dr. Chalongchai Phitsanuwong, author of the commentary. Dr. Phitsanuwong is a pediatric epileptologist with a focus on ketogenic diet therapy, practicing at Bumrungrad International Hospital in Bangkok, Thailand. Welcome, Dr. Phitsanuwong.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"><strong><span style= "font-family: 'Arial',sans-serif; color: #489872; mso-font-kerning: 0pt;"> Chalongchai Phitsanuwong, MD:</span></strong> <span style= "font-family: 'Arial',sans-serif; mso-font-kerning: 0pt;">Hello and good evening. Thank you very much for having me today.</span></span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"><strong><span style= "font-family: 'Arial',sans-serif; color: #dc7d3e; mso-font-kerning: 0pt;"> Host:</span></strong> <span style= "font-family: 'Arial',sans-serif; mso-font-kerning: 0pt;">And then, we are also joined by Dr. Priyamvada Tatachar, a pediatric epileptologist based in Chicago with a special interest in tuberous sclerosis and who also contributed to the commentary. Welcome, Dr. Tatachar.</span></span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"><strong><span style= "font-family: 'Arial',sans-serif; color: #9c5de1; mso-font-kerning: 0pt;"> Priyamvada Tatachar, MBBS, MD:</span></strong> <span style= "font-family: 'Arial',sans-serif; mso-font-kerning: 0pt;">Good morning from Chicago, and thank you for having me on this podcast.</span></span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"><strong><span style= "font-family: 'Arial',sans-serif; color: #dc7d3e; mso-font-kerning: 0pt;"> Host:</span></strong> <span style= "font-family: 'Arial',sans-serif; mso-font-kerning: 0pt;">Great to have you both with us. Let's dive in. Dr. Phitsanuwong, I'm going to start with you. To set the stage for our audience, what exactly are developmental and epileptic encephalopathies, sometimes abbreviated as DEEs, and how often are they likely to be drug resistant?</span></span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"><strong><span style= "font-family: 'Arial',sans-serif; color: #489872; mso-font-kerning: 0pt;"> Chalongchai Phitsanuwong, MD:</span></strong> <span style= "font-family: 'Arial',sans-serif; mso-font-kerning: 0pt;">Thank you very much, Dr. Marawar. So, developmental and epileptic encephalopathies, or DEEs, represent some of the most severe forms of epilepsy. It's characterized by frequent seizures and abundant epileptiform activity on the EEG. It is commonly associated with developmental slowing and/or regression, like you said.</span></span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-family: Arial, sans-serif; font-size: 12pt;">The current consensus is that both the underlying etiology and the seizures or epileptiform discharges contribute directly to this developmental stagnation or regression. DEEs carry an exceptionally high prevalence of becoming drug-resistant epilepsy, reaching up to 70% in some cohorts, by comparison to the typical 1/3 we see in general epilepsy population. So, more than double the numbers.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"><strong><span style= "font-family: 'Arial',sans-serif; color: #dc7d3e; mso-font-kerning: 0pt;"> Host:</span></strong> <span style= "font-family: 'Arial',sans-serif; mso-font-kerning: 0pt;">Dr. Tatachar, from a frontline clinical standpoint, what does the day-to-day burden of a drug-resistant DEE looks like for a child and their family, and where do current medication strategies most often fall short?</span></span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"><strong><span style= "font-family: 'Arial',sans-serif; color: #9c5de1; mso-font-kerning: 0pt;"> Priyamvada Tatachar, MBBS, MD:</span></strong> <span style= "font-family: 'Arial',sans-serif; mso-font-kerning: 0pt;">I think the word overwhelming comes to mind when families face the diagnosis of developmental and epileptic encephalopathies. For most patients and parents, the initial diagnosis is basically an uncharted territory that comes with a lot of fear, uncertainty, financial and social burdens, and the day-to-day challenges of caring for a child with significant medical, social, and developmental needs. It's a very daunting situation for them.</span></span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-family: Arial, sans-serif; font-size: 12pt;">Now, the current medical management focuses on the perspective of seizure control with several drugs added either alone or in combination for this reason. And as Dr. Phitsanuwong said, DEEs are particularly drug resistant. And based on the child's underlying diagnosis, additional challenges also need to be addressed for these families.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"><strong><span style= "font-family: 'Arial',sans-serif; color: #dc7d3e; mso-font-kerning: 0pt;"> Host:</span></strong> <span style= "font-family: 'Arial',sans-serif; mso-font-kerning: 0pt;">Dr. Phitsanuwong, the Hu, et al study, which you wrote the commentary for, found around a 50% seizure response rate with add-on ketogenic diet versus around 29% with anti-seizure medication adjustment alone, and a seizure-free rate of around 20% with diet versus around 10% with ASMs alone, both of which were deemed statistically significant. Now, how meaningful is a difference of that size to you, and how does it compare with what prior studies have shown?</span></span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"><strong><span style= "font-family: 'Arial',sans-serif; color: #489872; mso-font-kerning: 0pt;"> Chalongchai Phitsanuwong, MD:</span></strong> <span style= "font-family: 'Arial',sans-serif; mso-font-kerning: 0pt;">I think the result of this study is a highly meaningful context. Seizures in DEEs, like Dr. Tatachar said, are generally very difficult to control and have a high probability, of becoming drug resistant. In this prospective controlled trial, Hu and colleagues evaluated the patient with DEE who was still having seizure despite trying on an average of three anti-seizure medications already. And they found that adding ketogenic diet led to a significant higher seizure response rate. In the study, they defined as more than 50% seizure reduction, and they got the relative risk of 1.73. But what really stands out is the six-month seizure freedom rate from that.</span></span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-family: Arial, sans-serif; font-size: 12pt;">The dietary therapy group was nearly twice as likely to achieve the complete seizure freedom compared to continued medication alone, with relative risk of 1.9, so almost double. And this finding also aligned beautifully with the historical retrospective and prospective data that we have, where we typically see the seizure response rate around 40-60% in patients with DEE alongside around 10-30% complete seizure freedom rate. So, I think that it carries quite a meaningful result.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"><strong><span style= "font-family: 'Arial',sans-serif; color: #dc7d3e; mso-font-kerning: 0pt;"> Host:</span></strong> <span style= "font-family: 'Arial',sans-serif; mso-font-kerning: 0pt;">Great. Continuing with you, Dr. Phitsanuwong. So beyond seizure counts, the study also reported better EEG improvement and developmental gains in the diet group, 36% versus around 5% on formal assessment. Now, why is that developmental signal so important in this population, and how much weight should we give it?</span></span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"><strong><span style= "font-family: 'Arial',sans-serif; color: #489872; mso-font-kerning: 0pt;"> Chalongchai Phitsanuwong, MD:</span></strong> <span style= "font-family: 'Arial',sans-serif; mso-font-kerning: 0pt;">This is very important question because this highlights a critical paradigm shift in how we approach the treatment of DEEs currently. Because DEEs are commonly associated with developmental stagnation and regression that can also worsen over time, our therapeutic success cannot be measured solely just by the seizure control or seizure count.</span></span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-family: Arial, sans-serif; font-size: 12pt;">We should also focus equally on the neurodevelopmental and cognitive outcomes. While many anti-seizure medication, they are good, they can effectively reduce seizures. They frequently carry a heavy cognitive burden causing sedation, psychomotor slowing, impaired concentration, particularly in the setting of polypharmacy, which quite common in the patient with DEEs.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style= "font-family: Arial, sans-serif; font-size: 12pt;">Ketogenic diet therapy, on the other hand, offers a distinct advantage on this point. Multiple studies has shown that it can actively promote cognitive and developmental improvement, particularly in alertness, attention, and global cognitive abilities. Interestingly, there's one landmark systematic review by van Berkel and colleagues showed that this cognitive benefit appears to be independent to seizure control, meaning even patients can experience meaningful cognitive gains even before a significant seizure reduction is achieved or apparent.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-family: Arial, sans-serif; font-size: 12pt;">The study by Hu and colleagues strongly reinforces this, because they use formal age-appropriate assessment tools, and they documented a highly significant improvement as you showed the number, 30% to only 5% in developmental and cognitive scores in the dietary therapy group compared to the medication group.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-family: Arial, sans-serif; font-size: 12pt;">And what makes this finding so clean is that it occurred without adjusting or reducing baseline medication during the study period. This provides a strong signal that the ketogenic diet may exert an intrinsic neuroprotective benefit that directly support development and cognition in this patient population.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"><strong><span style= "font-family: 'Arial',sans-serif; color: #dc7d3e; mso-font-kerning: 0pt;"> Host:</span></strong> <span style= "font-family: 'Arial',sans-serif; mso-font-kerning: 0pt;">Dr. Tatachar, when you counsel a family about starting ketogenic diet, what are the practical realities they need to understand about feasibility, adherence, and the support a clinic has to provide?</span></span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"><strong><span style= "font-family: 'Arial',sans-serif; color: #9c5de1; mso-font-kerning: 0pt;"> Priyamvada Tatachar, MBBS, MD:</span></strong> <span style= "font-family: 'Arial',sans-serif; mso-font-kerning: 0pt;">Families and providers even usually are concerned about ketogenic diet initiation because they think it's a very complicated process. And unfortunately, this delays the initiation in many patients. It is really not that complicated if we understand the process well. Before initiating keto, a comprehensive evaluation of the child, their underlying diagnosis, specifically genetic diagnosis, the comorbidities, their metabolic health, whether they're oral or tube-fed status, and what are the social determinants of health? These are important things to assess to see if it's a feasible option for the family.</span></span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-family: Arial, sans-serif; font-size: 12pt;">In addition, are there any food allergies, cultural or religious restrictions, any restrictive eating behaviors in that child. For example, in autism spectrum disorders. These are important parameters to assess, then we can tailor the diet for that particular family. It usually involves sitting down and going over the treatment roadmap with the family with a keto dietician and talking about the entire process with the risk and benefits discussed in a very open and transparent manner.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-family: Arial, sans-serif; font-size: 12pt;">For this particular reason, dedicated ketogenic diet clinics are very helpful because they sit down with time, explain the rationale, initiation process, the formulas, the different types of the ketogenic diet from the most restrictive classic keto to the lesser restrictive diets, and which may also help improve adherence with the family. We have to monitor. There are surveillance labs that need to be ordered and followed up. And of course, the initial initiation part involves frequent telephone calls, telemedicine contact with the families that provides that extra layer of support and reassurance for the families that are already going through a lot. And this significantly improves adherence, and we've had families on ketogenic diet for over 10 years with really good compliance.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"><strong><span style= "font-family: 'Arial',sans-serif; color: #dc7d3e; mso-font-kerning: 0pt;"> Host:</span></strong> <span style= "font-family: 'Arial',sans-serif; mso-font-kerning: 0pt;">Dr. Phitsanuwong, your commentary makes the case for considering the ketogenic diet early rather than waiting until epilepsy is firmly drug resistant. What is the argument for early initiation? And what holds clinicians back from doing it? In addition, how long should it be continued, and what are the outcomes after the diet is stopped?</span></span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"><strong><span style= "font-family: 'Arial',sans-serif; color: #489872; mso-font-kerning: 0pt;"> Chalongchai Phitsanuwong, MD:</span></strong> <span style= "font-family: 'Arial',sans-serif; mso-font-kerning: 0pt;">Thank you for the series of questions. While we do not yet have a definitive and solid evidence to use ketogenic diet therapy before drug resistance develops across all the DEEs, largely because most of the literature focuses on drug-resistant cohorts. There are certain syndrome-specific DEEs where the ketogenic diet therapy can and should be deployed early.</span></span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-family: Arial, sans-serif; font-size: 12pt;">A prime example is epilepsy with myoclonic-atonic seizures, formerly called Doose syndrome. Overwhelmingly, global evidence demonstrates that ketogenic diet therapy is one of, if not, the most effective interventions we have for this population. In a large multi-center cohort study by Nickels and colleagues showed that dietary therapy yield a striking 79% seizure respond rate and a 57% seizure freedom rate in Doose syndrome, compared to just 26% respond rate with the standard anti-seizure medications. And crucially, in the same study, the authors identified that failing ketogenic diet therapy was an independent predictor of overall treatment failure in these children.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style= "font-family: Arial, sans-serif; font-size: 12pt;">Another compelling example that I can think of is in the infantile epileptic spasm syndrome. Data consistently shows that utilizing ketogenic diet therapy as a second-line therapy after failure of hormonal therapy or vigabatrin use, a 30% to 40% spasm-free rate along the clear EEG improvement.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style= "font-family: Arial, sans-serif; font-size: 12pt;">However, in fact, there's a recent randomized control trial published in 2025 from India by Mahesan and colleagues compared ketogenic diet therapy directly to ACTH as a first-line treatment for infantile epileptic spasm syndrome. And they found that they both have comparable efficacy, but with a lower relapse rate and more favorable side effect profile in the ketogenic diet arm.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style= "font-family: Arial, sans-serif; font-size: 12pt;">Giving these data points at this point and keeping in mind that we discussed earlier that the ketogenic diet also have intrinsic cognitive benefits, I believe that it's very reasonable to initiate dietary therapy early in selected patients with DEE. I don't think that we should feel compelled to wait until the epilepsy become firmly drug resistant and developmental slowing or regression is already apparent before we consider ketogenic diet therapy.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-family: Arial, sans-serif; font-size: 12pt;">And for your next question about what holds clinician back, personally, I think that it is truly multifactorial. It often stems from structural barriers, like a lack of a specialist ketogenic dietician in your institute or limited access to a dedicated ketogenic diet center. As Dr. Thatcher mentioned that it works best when you have the multidisciplinary dedicated program. But there are also some clinical and educational hurdles. For example, a general unfamiliarity on how to initiate, monitor, and manage the diet, which naturally affects the clinician's comfort level to even offer the patient or the family the diet.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-family: Arial, sans-serif; font-size: 12pt;">And additionally, I think that, there's still some perception of the patient's families or even clinicians that the diet are simply too difficult to implement or adhere to. And this factor leads many clinicians to hold back on starting the diet and viewing the diet therapy as an option of last resort, which is highly, highly unfortunate and not what the scientific data supports.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-family: Arial, sans-serif; font-size: 12pt;">Your last question is how long the diet should be continued for this question, I think it's highly individualized. It depends on the epilepsy diagnosis, specific syndrome, its natural history, their response to the therapy, any perceived cognitive benefits from the diet, and ultimately, it's a family's choice.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style= "font-family: Arial, sans-serif; font-size: 12pt;">Having said that, as a general rule of thumb, usually, we look at the landmark study from Johns Hopkins Hospital led by Dr. Kossoff, which they found that among the patients who responded remarkably well on the diet and achieved two years of seizure freedom, roughly around 80% of those patients remained seizure-free after the diet was discontinued.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-family: Arial, sans-serif; font-size: 12pt;">This also sends us a signal that the diet may have the long-lasting benefit with the patient because even after the diet is discontinued, 80% remain seizure-free. And because of this, it has become a clinical practice that to discuss about the diet discontinuation to the patient and family after the two years of the complete seizure freedom. However, the ultimate decision usually lies on the patients and the family decision.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"><strong><span style= "font-family: 'Arial',sans-serif; color: #dc7d3e; mso-font-kerning: 0pt;"> Host:</span></strong> <span style= "font-family: 'Arial',sans-serif; mso-font-kerning: 0pt;">Wonderful. Thank you for that answer. Dr. Tatachar, adverse effects in the study were mostly mild and gastrointestinal, with only about 3% discontinuing the therapy. In real-world practice, how manageable are the side effects and what monitoring do you put in place, for example, around growth, kidney stones, or bone health?</span></span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"><strong><span style= "font-family: 'Arial',sans-serif; color: #9c5de1; mso-font-kerning: 0pt;"> Priyamvada Tatachar, MBBS, MD:</span></strong> <span style= "font-family: 'Arial',sans-serif; mso-font-kerning: 0pt;">It's a great question. Initial side effects are common, especially when we are starting the diet, depending also on the age and the pre-morbid condition of the patient. We tend to do it as an inpatient setting. For that reason, it also provides us a time and opportunity to educate the caregivers.</span></span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-family: Arial, sans-serif; font-size: 12pt;">Most commonly when we start, there is something known as the keto flu, which is a fatigue that sets in because the brain is adjusting to the alternative source of nutrition. Gastrointestinal side effects are quite common, but they are quite manageable as well. Constipation being the most common side effect of the ketogenic diet, and we use osmotic laxatives, for example, to tackle that. Improving hydration is very important as well. Now, we also have to provide education about sick days and illnesses and how to combat these illnesses, while on the ketogenic diet for the family so that they can adequately manage and not have adverse side effects from that.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-family: Arial, sans-serif; font-size: 12pt;">Now, the long-term management and it's important to pay attention to kidney health and prompt supplementation. For example, with citrate salts, potassium citrate has been known to reduce renal stones. Surveillance is important, so we usually have labs done on these families. We also monitor fasting lipid profile as well as bone health like calcium and vitamin D and offer supplementation for trace minerals which may become deficient. For example, selenium and zinc and acetylcarnitine, for instance. These parameters are important to manage as we continue to monitor and surveil the child. It's very important also to make sure that the calorie intake is adequate for the growth of the child, and we plot their growth in an ongoing basis. For this reason, management of kids with developmental and epileptic encephalopathy is crucial in a multidisciplinary care setting, and this helps in providing a comprehensive care for that child.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"><strong><span style= "font-family: 'Arial',sans-serif; color: #dc7d3e; mso-font-kerning: 0pt;"> Host:</span></strong> <span style= "font-family: 'Arial',sans-serif; mso-font-kerning: 0pt;">Wonderful. Dr. Phitsanuwong, the study could not identify any predictor of who responds to the diet. You raise a very interesting idea of a biomarker to guide therapy selection. How close are we to that, and what would it change?</span></span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"><strong><span style= "font-family: 'Arial',sans-serif; color: #489872; mso-font-kerning: 0pt;"> Chalongchai Phitsanuwong, MD:</span></strong> <span style= "font-family: 'Arial',sans-serif; mso-font-kerning: 0pt;">Yeah. Thank you for the question. This is great question. So far, we do not have clear definitive biomarkers to predict an individual patient's response to ketogenic diet therapy. In clinical practice, we still rely primarily on syndrome-specific data or the underlying etiology to guide our expectations rather than individualized testing.</span></span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style= "font-family: Arial, sans-serif; font-size: 12pt;">However, there's some interesting research looking into biochemical predictors of the response. For instance, there's a notable study by Dr. Natasha Schloeler from University College London and Great Ormond Street Hospital, published in Epilepsia, showed that the diet responder cohort has a significantly higher baseline acetylcarnitine level compared to the non-responder group. And upon their follow-up study, they found that the specific carnitine fractions show a trend. It's not statistically significant, but it show a positive trend as a positive predictor of ketogenic diet response. So, this is some signal in biochemical, study. I believe that if we can uncover reliable biomarkers, not just for the dietary therapy, but for other anti-seizure medications as well, it would completely transform our practice.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-family: Arial, sans-serif; font-size: 12pt;">It would allow clinicians to tailor the treatments to the individual patient right from day one, and finally moving us away from the trial and error approach, that it's a good educated guess what we do, but we have to admit on some level it's a trial and error approach. So, to have biomarkers would be an ideal.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"><strong><span style= "font-family: 'Arial',sans-serif; color: #dc7d3e; mso-font-kerning: 0pt;"> Host:</span></strong> <span style= "font-family: 'Arial',sans-serif; mso-font-kerning: 0pt;">Dr. Tatachar, for a general neurologist who does not run a dedicated ketogenic diet program, what is a realistic pathway to offer dietary therapy to a patient who might benefit? When to refer and what to set up locally? And is there a centralized database that provides information on which centers provide the ketogenic diet?</span></span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"><strong><span style= "font-family: 'Arial',sans-serif; color: #9c5de1; mso-font-kerning: 0pt;"> Priyamvada Tatachar, MBBS, MD:</span></strong> <span style= "font-family: 'Arial',sans-serif; mso-font-kerning: 0pt;">Yes. Especially in the last few years, there has been robust research on the ketogenic diet, notably for weight loss, but this has helped because this has brought a lot of keto-friendly food into the consumer space as well. Understanding the concepts in dietary therapy initiation by using verified online resources that are available and enlisting a keto dietician would be the first steps for a clinician who's interested in setting up a diet clinic.</span></span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-family: Arial, sans-serif; font-size: 12pt;">In addition, there is the International Neurological Ketogenic Diet Society. Now, this society has webinars and symposia for those wanting to specialize in dietary therapies. In the United States, the Charlie Foundation for Ketogenic Diet and, in the UK, the Matthew's Friends Foundation, they have a keto college impact symposium that will help initiate people for the ketogenic diet program. And then, they can go back and set it up in their respective clinical practice. The Charlie Foundation actually has a list of all the ketogenic diet clinics in the US. And internationally, the International League Against Epilepsy, the ILAE, has a website for all the regional clinics listed around the world as well.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-family: Arial, sans-serif; font-size: 12pt;">Now, every state has a verified center and a provider who feels that patients may benefit from the diet. It should be able to look that up and then refer patients to that center. And I think, as Dr. Phitsanuwong can attest, it is a very close-knit community. And they're always willing to help new patients or set up new programs, and they're always willing to offer assistance to any new clinician that's interested</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"><strong><span style= "font-family: 'Arial',sans-serif; color: #dc7d3e; mso-font-kerning: 0pt;"> Host:</span></strong> <span style= "font-family: 'Arial',sans-serif; mso-font-kerning: 0pt;">Thank you. Dr. Phitsanuwong, to close, you suggest combining modalities, diet with surgery or diet with neurostimulation. Where do you see the treatment of DEEs heading over the next few years? And what is the one message you would want a clinician or a parent to take from this discussion?</span></span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"><strong><span style= "font-family: 'Arial',sans-serif; color: #489872; mso-font-kerning: 0pt;"> Chalongchai Phitsanuwong, MD:</span></strong> <span style= "font-family: 'Arial',sans-serif; mso-font-kerning: 0pt;">I personally see that the treatment of DEEs are gearing toward more and more etiologically and genetically specific therapies. With the emergence of gene editing or replacement therapy, the RNA-based antisense oligonucleotides and novel small molecules for specific genetic epilepsies. The pipeline is incredibly active and highly exciting right now.</span></span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style= "font-family: Arial, sans-serif; font-size: 12pt;">However, because DEEs are extraordinarily heterogeneous and driven by a vast variety of etiologies, it is unlikely that we will have a specific disease-modifying therapy for every single one of them in the near future. And because of that, I still personally believe that ketogenic diet therapies would remain a highly attractive option because they offer proven efficacy in the seizure control. They can promote development and cognitive abilities, and also provide a variety of the diet types that we can tailor toward the individual patient's circumstances and needs.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-family: Arial, sans-serif; font-size: 12pt;">If there is one message that I could leave it to other peers and the patients, it would be I would humbly but strongly encourage other peer neurologists and patients and families to employ the dietary therapy sooner rather than later for the patients with developmental and epileptic encephalopathies before the developmental regression or stagnation would become apparent.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-size: 12pt;"><strong><span style= "font-family: 'Arial',sans-serif; color: #dc7d3e; mso-font-kerning: 0pt;"> Host:</span></strong> <span style= "font-family: 'Arial',sans-serif; mso-font-kerning: 0pt;">Thank you both for such a clear and practical discussion. Today, we heard that for children with developmental and epileptic encephalopathies, the ketogenic diet is more than a last resort. In this study, it roughly doubled the seizure-free rate compared with medication adjustment alone, improved EEG findings and, importantly, was linked to better developmental progress, all with side effects that were largely mild and manageable.</span></span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-family: Arial, sans-serif; font-size: 12pt;">For clinicians listening, perhaps the takeaway is this: when a child with a DEE isn't responding to medications, dietary therapy deserves a seat at the table early, not after every other option is exhausted when development has already suffered. And for families, it's a reminder that meaningful options exist and that the right team can make this therapy feasible.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style= "font-family: Arial, sans-serif; font-size: 12pt;"><span style= "mso-spacerun: yes;"> </span>Special thanks to our sponsor, UCB. For over three decades, UCB has been committed to people living with epilepsy and their families by leading in research, development, and treatment innovation. Past breakthroughs are only a prologue to the future as UCB reimagines how they care for patients and their families. Learn more at <a href= "https://www.ucbcompass.com">ucbcompass.com</a>.</span></p> <p class="MsoNormal" style= "margin-bottom: 0in; line-height: normal; mso-pagination: none; mso-layout-grid-align: none; text-autospace: none;"> <span style="font-family: Arial, sans-serif; font-size: 12pt;">If you found value in this episode, share with a colleague, a trainee, or a family who might benefit from this conversation. And as always, subscribe and follow Epilepsy Currents on your favorite podcast app for insights that bridge research and real life. You can also find us on epilepsycurrents.org. Until next time, take care and keep the dialogue going.</span></p>