Deep Dive: Medical Perspectives

About Deep Dive: Medical Perspectives

Medical Musings johnsonthomasmd.substack.com (https://johnsonthomasmd.substack.com?utm_medium=podcast)

Publisher

Johnson Thomas

Category

health & fitness · health & fitness

Language

en

Explicit

No

First episode

8 Jan 2025

Latest episode

22 Mar 2025

Latest episodes

6 episodes in the feed.

1. 

   22 Mar 2025

   Why Do Some Patients Do Not Feel Well on Levothyroxine Therapy?

   🎙 Episode Title: Why Do Some Patients Still Feel Unwell on Levothyroxine Therapy? 📅 Release Date: 3/19/2025 🔎 Episode Summary:In this episode, we dive into a common frustration for many patients with hypothyroidism: feeling unwell despite "normal" thyroid blood tests while on Levothyroxine therapy. Up to 15–20% of patients report a lower quality of life, and around 1 in 4 continue to experience hypothyroid-like symptoms despite normal TSH levels. We explore why this happens, potential diagnostic steps, and alternative treatment options to help patients and providers navigate this complex issue. 🔹 Episode Breakdown 🎧 Introduction (0:00 - 5:00) Overview of Levothyroxine as the standard treatment for hypothyroidism. Acknowledging the persistent symptoms in some patients despite normal TSH levels. Discussion of the article "Why Do Some Patients Do Not Feel Well on Levothyroxine Therapy?" 🔍 Main Discussion Points (5:00 - 35:00) 1️⃣ Suboptimal Levothyroxine Dosage or Absorption Issues Poor gastrointestinal absorption due to celiac disease, atrophic gastritis, or H. pylori infection. Medications like calcium, iron, proton pump inhibitors interfere with absorption. 💡 Actionable Advice: Take Levothyroxine on an empty stomach, separate from calcium, iron, and soy by at least 4 hours. 🩺 Diagnostic Steps: Celiac disease antibodies, Parietal Cell Antibodies (PCA), Levothyroxine absorption test. 2️⃣ Concurrent Autoimmune Diseases Hashimoto’s thyroiditis increases the risk of adrenal insufficiency, celiac disease, and pernicious anemia. Recommended screening: Morning cortisol, ACTH, B12 levels. 3️⃣ Other Medical Conditions Conditions like diabetes and hypertension can mimic hypothyroid symptoms. Ensuring proper management of these comorbidities is crucial. 4️⃣ Anemia and Nutrient Deficiencies Iron and folate deficiencies can lead to fatigue, weakness, and cognitive issues. Diagnostic tests: CBC, ferritin, RBC folate levels. 5️⃣ Sleep Disorders Sleep apnea and insomnia are common in hypothyroid patients. Solutions: Sleep studies, sleep hygiene counseling, possible sleep medications. 6️⃣ Mental Health Conditions Depression and anxiety often coexist with hypothyroidism. Psychological evaluation and treatment options. 7️⃣ Fibromyalgia or Chronic Fatigue Syndrome (CFS) Overlapping symptoms with hypothyroidism. Need for thorough differential diagnosis. 8️⃣ Medication Side Effects Beta-blockers, antidepressants, and other medications can mimic hypothyroid symptoms. Medication review with a healthcare provider is recommended. 9️⃣ Pituitary or Hypothalamic Disorders (Central Hypothyroidism) In some cases, TSH may be inappropriately normal or low. Important to check Free T4 and T3 levels for accurate diagnosis. 🔟 Overtreatment or Supersensitivity to Thyroid Hormone Some individuals may develop hyperthyroid-like symptoms even with normal TSH. Adjusting dosage may be necessary. 1️⃣1️⃣ Time-Course Factors Recovery from hypothyroidism can take months. Educating patients about normal recovery patterns can reduce anxiety. 1️⃣2️⃣ Incomplete T4-to-T3 Conversion Some patients have impaired T4 to T3 conversion, leading to low T3 levels despite normal TSH. Genetic variations in DIO2 enzyme have been linked to poor well-being on Levothyroxine alone. T3 supplementation may improve symptoms in select cases. 💡 Alternative Treatment Options (35:00 - 40:00) Combination Therapy (Levothyroxine + Liothyronine [T4/T3]) Desiccated Thyroid Extract (DTE) Liquid Levothyroxine or Gel Capsules for patients with absorption issues. 🛑 Conclusion (40:00 - 42:00) Persistent symptoms on Levothyroxine are a recognized issue with multiple potential causes. A personalized approach is key to improving patient well-being. Importance of regular follow-ups with an endocrinologist or thyroid specialist. 📢 Call to Action & Further Discussion (42:00 - 45:00) ✅ If you still feel unwell on Levothyroxine, discuss these possibilities with your doctor.✅ Keep a symptom journal and track medication intake.✅ Stay informed and advocate for your own health. 📖 Source: Based on the article "Why Do Some Patients Do Not Feel Well on Levothyroxine Therapy?" 🔔 Subscribe & Follow for more in-depth discussions on thyroid health and endocrinology. 📝 Disclaimer: This episode is for educational purposes only and not a substitute for medical advice. Always consult a healthcare professional for diagnosis and treatment. Get full access to Medical Musings at johnsonthomasmd.substack.com/subscribe (https://johnsonthomasmd.substack.com/subscribe?utm_medium=podcast&utm_campaign=CTA_4)

2. 

   20 Mar 2025

   Why Do Some Patients Not Feel Well on Levothyroxine Therapy?

   Introduction Levothyroxine (LT4) is the standard treatment for hypothyroidism and usually restores normal thyroid hormone levels and alleviates symptoms. However, a subset of patients on LT4 continue to feel unwell despite “normal” thyroid blood tests. Studies estimate that 15–20% of LT4-treated patients have a lower quality of life compared to healthy controls, and roughly one in four patients may report persistent hypothyroid-like symptoms even with a normal TSH (thyroid stimulating hormone) level. This article explores why some patients have persistent symptoms, outlines differential diagnoses and additional testing to consider, and reviews alternative treatment options (like adding liothyronine T3 or using desiccated thyroid extract). Medical Musings is a reader-supported publication. To receive new posts and support my work, consider becoming a free or paid subscriber. Reasons for Persistent Symptoms and work up Several factors may contribute to patients feeling unwell on LT4 monotherapy: Suboptimal LT4 Dosage or Absorption Issues: Some patients require higher doses of LT4 due to poor gastrointestinal absorption caused by conditions like celiac disease, atrophic gastritis, or Helicobacter pylori infection. Medications like calcium, iron, and proton pump inhibitors can also reduce LT4 absorption. * Check for celiac disease antibodies if you suspect gluten sensitivity as the reason for malabsorption. * If you are suspecting atrophic gastritis, you can start the work up with a complete blood count and ferritin. You could also order Parietal Cell Antibodies (PCA) * Advise to take calcium, iron and soy products to be separated from levothyroxine ingestion by at least 4 hours. * Levothyroxine absorption test can also be done to rule out issues with absorption. Concurrent Autoimmune Diseases (e.g., Addison’s disease, celiac disease, vitamin B12 deficiency)Patients with Hashimoto’s thyroiditis have a higher risk of developing other autoimmune disorders, which can contribute to fatigue and systemic symptoms. Screening for adrenal insufficiency, celiac disease, and pernicious anemia (B12 deficiency) is recommended in patients with ongoing symptoms. * Check morning (8 am) cortisol and ACTH to rule out adrenal insufficiency. * Check B12 level Other medical conditions like diabetes or hypertension that are not under control. Uncontrolled diabetes can lead to fatigue, weight changes, and neuropathy, while poorly managed hypertension can cause headaches, dizziness, and cardiovascular symptoms. Optimizing management of these conditions is essential for improving overall health and symptom resolution. Anemia and Nutrient Deficiencies: Iron deficiency anemia, and folate deficiency can contribute to fatigue, weakness, and cognitive dysfunction. These deficiencies are more common in patients with autoimmune thyroid disease and should be screened for and corrected when necessary. * Check CBC and ferritin * If folate deficiency is suspected, order Red Blood Cell (RBC) Folate Levels. Elevated plasma homocysteine can be an indirect marker of folate deficiency, but not specific. Sleep Disorders (e.g., sleep apnea, insomnia)Obstructive sleep apnea (OSA) is prevalent in individuals with hypothyroidism and can contribute to persistent fatigue. Insomnia and poor sleep hygiene can also impact energy levels and cognitive function. * Sleep studies (home or in hospital) and proper sleep hygiene counseling may improve symptoms. * For insomnia, consider sleep medications. Mental Health Conditions (Depression, Anxiety Disorders) Depression and anxiety frequently coexist with hypothyroidism and can contribute to persistent symptoms such as fatigue, low motivation, and brain fog. Psychological evaluation and appropriate treatment, including therapy or medications, can significantly improve well-being. Fibromyalgia or Chronic Fatigue Syndrome (CFS) These conditions share many symptoms with hypothyroidism, such as muscle pain, unrefreshing sleep, and chronic fatigue. A thorough evaluation to differentiate these syndromes from residual hypothyroid symptoms is necessary to ensure appropriate treatment. Medication Side Effects: Certain medications, such as beta-blockers,and antidepressants, can mimic or exacerbate symptoms of hypothyroidism, including fatigue and cognitive dysfunction. Reviewing a patient’s medication list and adjusting or substituting medications when appropriate can help alleviate symptoms. Pituitary or Hypothalamic Disorders (Central Hypothyroidism): In central hypothyroidism, TSH is often low or inappropriately normal, making free T4 and T3 the primary indicators of thyroid status. Patients with pituitary disease often require individualized LT4 dosing, targeting free T4 in the upper normal range to ensure adequate hormone availability. Overtreatment or increased sensitivity to Thyroid Hormone: Some patients may experience symptoms of hyperthyroidism, such as anxiety, palpitations, and insomnia, even when TSH is within the normal range / on the lower side. This may be due to individual sensitivity to thyroid hormone levels or excessive LT4 dosing. Reducing the dose while monitoring symptoms can help restore balance. Time-Course Factors: Recovery from hypothyroidism is not immediate, and some symptoms may take months to resolve after achieving biochemical euthyroidism. Patients with high health-related anxiety may misinterpret normal fluctuations in energy and mood as continued hypothyroidism. Education and reassurance can be valuable in these cases. Incomplete T4-to-T3 Conversion: Levothyroxine gets converted to T3, the active hormone, in tissues. Some patients may not convert T4 to T3 efficiently, leaving tissues relatively T3-deficient despite normal blood T4 and TSH. For example, LT4-treated patients as a group have a ~15–20% lower T3:T4 ratio and about 15% fail to maintain normal T3 levels in serum. A common genetic variation in the Type 2 deiodinase enzyme (DIO2 Thr92Ala polymorphism) has been linked to impaired psychological well-being on LT4 alone and reduced T4-to-T3 conversion. These findings suggest that standard LT4 therapy might not fully restore tissue T3 levels or euthyroidism in every individual. Indeed, one clinical trial found that adding T3 improved mood and neuropsychological function in LT4-treated patients, supporting the idea that T4 alone may be inadequate for a subset of patients. In such patients treatment that contains T3 might be helpful. Alternative Treatment Options for Persistent Symptoms If a patient’s LT4 dose is optimized and other conditions have been ruled out or treated, yet they still feel poorly, clinicians and patients may consider alternative thyroid hormone therapies. These include: * Combination Levothyroxine + Liothyronine Therapy (T4/T3 Combination) * Desiccated Thyroid Extract (DTE) * In patients with absorption issues - liquid levothyroxine or gel capsules can be considered. Conclusion While levothyroxine monotherapy effectively treats most hypothyroid patients, a considerable minority experience ongoing symptoms or intolerance. A careful differential diagnosis and targeted testing are essential to uncover contributing factors. If persistent symptoms remain after optimization of standard therapy and management of comorbidities, individualized treatment approaches can be explored. Patient-centered care, regular follow-ups, and therapy adjustments based on subjective and objective measures can help optimize well-being. Thanks for reading Medical Musings! This post is public so feel free to share it. References * Peterson SJ, Cappola AR, Castro MR, et al. An Online Survey of Hypothyroid Patients Demonstrates Prominent Dissatisfaction. Thyroid. 2018;28(6):707-721. doi:10.1089/thy.2017.0681 * Hidalgo J, Vallejo BA, Soto Jacome C, et al. Real Practice Assessment of Persistent Symptoms After Initiation of Levothyroxine. Endocr Pract. 2024;30(2):95-100. doi:10.1016/j.eprac.2023.10.132 * Vargas-Uricoechea H, Wartofsky L. LT4/LT3 Combination Therapy vs. Monotherapy with LT4 for Persistent Symptoms of Hypothyroidism: A Systematic Review. Int J Mol Sci. 2024;25(17):9218. Published 2024 Aug 25. doi:10.3390/ijms25179218 * Bunevicius R, Kazanavicius G, Zalinkevicius R, Prange AJ Jr. Effects of thyroxine as compared with thyroxine plus triiodothyronine in patients with hypothyroidism. N Engl J Med. 1999;340(6):424-429. doi:10.1056/NEJM199902113400603 Get full access to Medical Musings at johnsonthomasmd.substack.com/subscribe (https://johnsonthomasmd.substack.com/subscribe?utm_medium=podcast&utm_campaign=CTA_4)

3. 

   13 Feb 2025

   The Many Faces of Hunger: Physiological, Psychological, and Beyond

   Here's something that might surprise you - our bodies can actually experience three completely different types of hunger, and most of us are responding to the wrong signals every single day. That's fascinating, and it explains so much about why we sometimes feel hungry right after eating a full meal. What exactly makes these different types of hunger so distinct? Well, it comes down to the complex interplay between our hormones, brain chemistry, and even our emotions. The first type - physiological hunger - is what we'd call "true hunger." It develops gradually over several hours and comes with actual physical symptoms like a growling stomach or feeling weak. So that's completely different from when I walk past a bakery and suddenly feel like I need a croissant right this second, right? Exactly right - that's what we call sensory hunger, and here's what's really interesting: our ancestors developed these responses when food was scarce. Their brains were wired to say "eat this high-calorie food while you can!" The problem is, we still have those same circuits, but now we're surrounded by tempting foods 24/7. Hmm... and I'm guessing this is where the hormone ghrelin comes into play? You know, that's EXACTLY right. Ghrelin is fascinating because it's like our body's internal fuel gauge. When we need energy, our stomach produces ghrelin, sending signals to our brain saying "time to eat!" But here's the kicker - lack of sleep can actually increase ghrelin levels making us feel artificially hungry. That explains why I always want to eat everything in sight after a bad night's sleep! And I've noticed it's usually carb-heavy foods I'm craving in those situations. Well, there's actually a scientific reason for that. When we're sleep-deprived, our bodies crave quick energy sources - mainly carbs and sugars. But here's something most people don't realize: just one night of poor sleep can increase our calorie intake by up to 300 calories the next day. And then there's emotional hunger - which I'm guessing is behind a lot of our stress eating? Oh absolutely - and this is where it gets really interesting. Studies show that when we're stressed, our bodies release cortisol, which can increase appetite. Even more fascinating? Research has found that stressed individuals tend to choose foods with more calories compared to when they're relaxed. Those numbers are staggering. So how do we actually manage these different types of hunger? Well, I've found the "apple test" to be incredibly effective - if you wouldn't eat an apple when you're feeling hungry, you're probably experiencing emotional or sensory hunger rather than true hunger. Studies show this simple check-in can reduce unnecessary snacking. That's such a practical tip. I've also heard that drinking water can help, since we sometimes confuse thirst with hunger. You know what's fascinating about that? Research shows that sometimes when we think we're hungry, we're actually just thirsty. And here's another surprising fact: eating protein-rich foods can reduce ghrelin levels compared to high-carb meals. Speaking of meals, I've noticed that eating at consistent times seems to help manage my hunger better. That's because our bodies actually have an internal clock that anticipates meal times. Studies show that people who eat at regular times have better appetite control and fewer cravings throughout the day. Plus, consistent meal timing can help regulate those hunger hormones we talked about earlier. These insights really change how we should think about hunger, don't they? They really do, and here's what it all comes down to: understanding these different types of hunger gives us the power to make better choices. Research shows that people who can identify their hunger type are 40% more likely to maintain a healthy weight long-term. And I suppose the key is not beating ourselves up when we occasionally give in to those non-physiological hunger cues. That's exactly right. The goal isn't perfection - it's awareness. And remember, while these strategies can be helpful, consulting with healthcare professionals for personalized advice is always recommended, especially since everyone's body responds differently to hunger signals. Get full access to Medical Musings at johnsonthomasmd.substack.com/subscribe (https://johnsonthomasmd.substack.com/subscribe?utm_medium=podcast&utm_campaign=CTA_4)

4. 

   16 Jan 2025

   The Hormonal Science of Weight Loss: Diet vs. Exercise Explained

   The intricate dance between hormones and weight loss remains one of the most fascinating aspects of human metabolism. While the basic equation seems simple—burn more calories than you consume—the hormonal mechanisms behind weight loss tell a far more complex story. When we diet or exercise, our bodies respond through distinct hormonal pathways, each triggering its own cascade of metabolic changes. Yet perhaps the most challenging aspect of weight loss isn't shedding the pounds initially, but maintaining that loss over time. Our bodies fight to regain lost weight through powerful hormonal adaptations, leading many to experience the frustrating cycle of weight loss and regain. By understanding the unique hormonal signatures of diet versus exercise—and how they complement each other—we can better approach the challenge of sustainable weight management. Medical Musings is a reader-supported publication. To receive new posts and support my work, consider becoming a free or paid subscriber. This exploration delves into how dieting and exercise differently influence our hormonal landscape, and why combining these approaches might hold the key to lasting weight loss success. Through the lens of endocrinology, we'll uncover why some traditional weight loss methods fall short and how a hormone-conscious approach could better our understanding of sustainable weight management. Following is a simplified way to look at hormonal changes during weight loss. Hormonal Changes During Weight Loss from Dieting When we restrict calories, our body interprets this as a survival threat, triggering hormonal adaptations that conserve energy and promote food intake. These adaptations involve several key hormones: Appetite Regulation Hormones: * Ghrelin levels increase during caloric restriction, intensifying hunger signals and food cravings. This "hunger hormone" makes adherence to dietary restrictions particularly challenging. * Leptin, which normally signals satiety and maintains metabolic rate, decreases with prolonged dieting. This reduction slows metabolism and increases appetite, contributing to weight regain after restrictive diets. * Cholecystokinin (CCK), responsible for feelings of fullness, diminishes during dieting, potentially leading to more frequent eating patterns. * Glucagon-like peptide-1 (GLP-1) levels decrease with weight loss, affecting satiety signals, making long-term weight maintenance more difficult. Stress and Sex Hormones: * Chronic calorie restriction elevates cortisol, the primary stress hormone. This elevation can counterproductively promote abdominal fat storage while breaking down muscle tissue. * Research in the journal Nutrients demonstrates that significant body fat reduction (35-50%) through dieting decreases testosterone and estradiol levels in normal-weight females, though these changes normalize after increasing caloric intake and reducing exercise. This complex interplay of hormonal changes helps explain why maintaining weight loss proves challenging for many individuals. Importance of protein. Adequate lean protein intake while dieting is crucial for preserving muscle mass and promoting muscle growth, even while in a calorie deficit. Protein's high satiety effect helps to regulate the hunger hormone ghrelin, keeping you feeling fuller for longer and reducing cravings. This can make it easier to stick to your diet and achieve your weight loss goals while maintaining a healthy and strong physique. Hormonal Changes During Weight Loss from Exercise Exercise, particularly resistance training, triggers distinct hormonal responses that support weight loss and metabolic health. These adaptations involve several key mechanisms: Muscle-Building and Fat Loss Hormones: * Resistance training stimulates growth hormone and testosterone release, promoting muscle development and fat reduction. Since muscle tissue is metabolically active, increased muscle mass enhances resting caloric burn, supporting long-term weight management. * High-intensity exercise, combining strength and aerobic training, helps preserve muscle mass while facilitating weight loss, reducing the risk of rebound weight gain. Metabolic Regulation: * Regular exercise improves insulin sensitivity, requiring less insulin to manage blood glucose. This enhanced efficiency reduces fat storage and helps prevent metabolic disorders like type 2 diabetes. * Exercise may help optimize ghrelin regulation. While research shows mixed results on immediate ghrelin responses, studies indicate that exercise-induced weight loss improves the body's ability to suppress ghrelin after meals. * GLP-1 release tends to increase 90-180 minutes post-exercise, potentially enhancing satiety and appetite control. Exercise Types and Implementation: Resistance training can be performed using: * Free weights * Weight machines * Body weight exercises * Resistance bands For optimal results and injury prevention, beginners should: * Start at an appropriate fitness level * Progress gradually in intensity and duration * Work with qualified fitness professionals to ensure proper form Beyond weight management, resistance training offers additional benefits including improved bone health, balance, coordination, and functional strength for daily activities. When combined with adequate sleep, which helps regulate ghrelin levels, exercise becomes part of a comprehensive approach to hormonal balance and weight management. Key: * ↑ = Increase * ↓ = Decrease * ↔ = No significant change or variable effects Power of Synergy: Rationale for Combining Diet and Exercise While diet and exercise can independently promote weight loss, their combination creates powerful synergistic effects. This integrated approach addresses multiple aspects of weight management: Metabolic Benefits: * Exercise, particularly resistance training, preserves lean muscle mass during caloric restriction, preventing the metabolic slowdown typically associated with dieting alone * Maintained muscle mass continues to support higher resting energy expenditure, enhancing long-term weight management Hormonal Optimization: * Exercise helps counteract unfavorable hormonal changes that occur with dietary restriction alone * Protein-rich meals provide superior appetite suppression compared to high-fat or high-carbohydrate options, supporting better hunger control Psychological and Practical Support: * Regular physical activity improves mood and stress management, reducing the likelihood of emotional eating * A balanced diet provides essential nutrients that fuel effective workouts and support muscle recovery Additional dietary strategies, such as intermittent fasting, may offer benefits for some individuals, though professional medical guidance is recommended before implementation. This comprehensive diet-exercise approach creates a sustainable framework for long-term weight management by addressing both physiological and behavioral factors. Conclusion Weight loss is not simply about calories in versus calories out. It's a complex interplay of hormonal signals that influence appetite, metabolism, and body composition. While both diet and exercise play a role, combining them offers a synergistic approach that optimizes hormonal responses, promotes sustainable weight loss, and improves overall health. This integrated strategy is the key to achieving and maintaining a healthy weight in the long run. Adequate sleep is also crucial for the success of diet and exercise. Getting enough sleep supplies the body with the energy it needs to exercise and may also help reduce cortisol levels, which can aid weight loss. It is important to remember that there is no "magic bullet" for weight loss. A combination of diet, exercise, good sleep and stress management is crucial for achieving sustainable weight loss and maintaining a healthy weight in the long term. References 1. Schwarz NA, Rigby BR, La Bounty P, Shelmadine B, Bowden RG. A review of weight control strategies and their effects on the regulation of hormonal balance. J Nutr Metab. 2011;2011:237932. doi:10.1155/2011/237932. Accessed January 7, 2025. https://pmc.ncbi.nlm.nih.gov/articles/PMC3147122/ (https://pmc.ncbi.nlm.nih.gov/articles/PMC3147122/) 2. Hulmi JJ, Isola V, Suonpää M, et al. The effects of intensive weight reduction on body composition and serum hormones in female fitness competitors. Front Physiol. 2017;7:689. doi:10.3389/fphys.2016.00689. Accessed January 7, 2025. https://pmc.ncbi.nlm.nih.gov/articles/PMC5222856/ 3. Cummings DE, Purnell JQ, Frayo RS, Schmidova K, Wisse BE, Weigle DS. A preprandial rise in plasma ghrelin levels suggests a role in meal initiation in humans. Diabetes. 2001;50(8):1714-1719. doi:10.2337/diabetes.50.8.1714. 4. Hill EE, Zack E, Battaglini C, Viru M, Viru A, Hackney AC. Exercise and circulating cortisol levels: the intensity threshold effect. J Endocrinol Invest. 2008;31(7):587-591. doi:10.1007/BF03345606. 5. Epel E, Lapidus R, McEwen B, Brownell K. Stress may add bite to appetite in women: a laboratory study of stress-induced cortisol and eating behavior. Psychoneuroendocrinology. 2001;26(1):37-49. doi:10.1016/S0306-4530(00)00035-4. 6. Borghouts LB, Keizer HA. Exercise and insulin sensitivity: a review. Int J Sports Med. 2000;21(1):1-12. doi:10.1055/s-2000-8847. 7. Stiegler P, Cunliffe A. The role of diet and exercise for the maintenance of fat-free mass and resting metabolic rate during weight loss. Sports Med. 2006;36(3):239-262. doi:10.2165/00007256-200636030-00005. 8. Salmon P. Effects of physical exercise on anxiety, depression, and sensitivity to stress: a unifying theory. Clin Psychol Rev. 2001;21(1):33-61. doi:10.1016/S0272-7358(99)00032-X. 9. Greenway FL. Physiological adaptations to weight loss and factors favouring weight regain. Int J Obes (Lond). 2015;39(8):1188-1196. doi:10.1038/ijo.2015.59 Medical Musings is a reader-supported publication. To receive new posts and support my work, consider becoming a free or paid subscriber. Get full access to Medical Musings at johnsonthomasmd.substack.com/subscribe (https://johnsonthomasmd.substack.com/subscribe?utm_medium=podcast&utm_campaign=CTA_4)

5. 

   16 Jan 2025

   Diet vs. Exercise: Hormonal Changes During Weight Loss

   In this video, we dive deep into the science behind weight loss, focusing on the hormonal changes triggered by dieting and exercise. You'll learn: How hormones like ghrelin, leptin, and cortisol impact hunger, metabolism, and fat storage. Why exercise supports weight loss by improving insulin sensitivity, building muscle, and regulating appetite. The powerful synergy of combining diet and exercise for sustainable results. Additional benefits of a holistic approach, including better bone health, mood, and reduced risk of chronic diseases. Whether you're starting your weight loss journey or looking for insights to maintain your progress, this video offers science-backed strategies for success. Don't forget to like, subscribe, and comment with your thoughts or questions! Get full access to Medical Musings at johnsonthomasmd.substack.com/subscribe (https://johnsonthomasmd.substack.com/subscribe?utm_medium=podcast&utm_campaign=CTA_4)

6. 

   8 Jan 2025

   Hyperparathyroidism

   Hyperparathyroidism, a disorder characterized by overactive parathyroid glands, results in excessive parathyroid hormone (PTH) production, leading to dysregulated calcium, phosphorus, and vitamin D levels. This imbalance impacts bone health, kidney function, cardiovascular health, and mental well-being. Types and Causes: Primary Hyperparathyroidism: Caused by benign tumors (adenomas - 80-85% of cases), gland enlargement (hyperplasia), or rarely, carcinoma. This leads to autonomous PTH overproduction and elevated blood calcium (hypercalcemia). "Primary hyperparathyroidism occurs when one or more parathyroid glands become overactive, usually due to a benign tumor (adenoma) or gland enlargement (hyperplasia)." Secondary Hyperparathyroidism: Develops as a compensatory response to low calcium or vitamin D, often due to chronic kidney disease (CKD). PTH increases to normalize calcium, but levels often remain low or normal. "Secondary hyperparathyroidism occurs as a response to low calcium levels, often due to chronic kidney disease (CKD), vitamin D deficiency, or malabsorption syndromes." Tertiary Hyperparathyroidism: A progression of long-standing secondary hyperparathyroidism where the parathyroid glands become autonomously overactive, leading to high PTH and calcium levels. "Tertiary hyperparathyroidism [...] occurs when secondary hyperparathyroidism persists for a long time, causing the parathyroid glands to become autonomously hyperfunctional." Symptoms: While some remain asymptomatic, common manifestations include: "Stones, bones, abdominal groans, and psychic moans" - encapsulating kidney stones, bone pain, gastrointestinal issues, and neuropsychiatric symptoms. Fatigue, muscle weakness, depression, memory problems, increased thirst and urination. Diagnosis: Blood tests are crucial, measuring calcium and PTH levels. 24-hour urine collection assesses calcium excretion. Bone density scans evaluate bone loss. Imaging studies (ultrasound, nuclear scans, 4D CT) locate overactive glands. Impact and Complications: Bone Density: Excessive PTH causes bone resorption, leading to osteopenia, osteoporosis, and increased fracture risk. Cortical bone is particularly affected. "Primary hyperparathyroidism significantly affects bone density [...] leading to increased bone resorption, particularly at cortical sites." Psychological Effects: Depression, anxiety, cognitive impairment, and even acute psychosis can occur. "Hyperparathyroidism can significantly affect mental health [...] Depression and anxiety are particularly common, occurring in up to 53% of patients with primary hyperparathyroidism." Cardiovascular Effects: Increased risk of hypertension, arrhythmias, left ventricular hypertrophy, valvular and myocardial calcification, and heart failure. "Hyperparathyroidism can have significant effects on the cardiovascular system, increasing the risk of heart disease and related complications." Kidney Stones: Hypercalciuria (excess calcium in urine) increases the risk of calcium oxalate or calcium phosphate kidney stones. "Hyperparathyroidism significantly increases the risk of kidney stone formation due to elevated calcium levels in the blood and urine." Treatment: Primary & Tertiary: Parathyroidectomy (surgical removal of affected gland(s)) is the only curative treatment. Secondary: Focuses on the underlying cause, including vitamin D supplementation, phosphate binders, or calcimimetics. Medications like bisphosphonates and cinacalcet manage symptoms and control calcium levels. Long-Term Outlook: Early diagnosis and treatment are crucial. Primary hyperparathyroidism generally has a favorable prognosis with appropriate management. Successful parathyroidectomy improves physical and mental health, often reversing cardiovascular abnormalities and reducing the risk of complications. Conclusion: Understanding the different types, causes, symptoms, and potential complications of hyperparathyroidism is crucial for timely diagnosis Get full access to Medical Musings at johnsonthomasmd.substack.com/subscribe (https://johnsonthomasmd.substack.com/subscribe?utm_medium=podcast&utm_campaign=CTA_4)

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