Root Cause CSI™ — because healing starts with evidence.
Hosted by Joan Lu, PhD, RN, PHN, BC-FMP
PhD in Natural Medicine
This is not another wellness podcast. Root Cause CSI™ uses Clinical. Scientific. Investigations. to uncover the real reasons behind chronic symptoms.
Each episode breaks down functional labs, nutrient patterns, food-as-medicine strategies, and clinical insights—giving you the tools to stop guessing and start investigating.
This show is your evidence-based guide to root-cause healing.
🎙️ Subscribe now and follow the evidence.
High blood pressure is not just about the numbers—it may be a signal.
In this deep dive episode, we explore hypertension through a functional medicine lens, while also comparing conventional and Traditional Chinese Medicine perspectives.
We discuss how micronutrient imbalances—such as magnesium, potassium, and CoQ10—along with insulin resistance, chronic stress, inflammation, and medication-related nutrient depletion, may play a role in how the body regulates blood pressure.
This episode is intended to expand your understanding of hypertension beyond symptom management and into root-cause thinking.
Interested in micronutrient testing? Learn more at joanlu.com.
For educational purposes only. Please consult your healthcare provider for medical care.
8 Apr 2026
Episode 10: Insulin Resistance
Insulin resistance is not just about sugar.
Two people can eat the same meal-but have completely different blood sugar responses.
That's not just about food.
That's about body chemistry.
In this episode, we break it down through three lenses:
Conventional Medicine - glucose and insulin regulation
Functional Medicine - root causes, inflammation, nutrients
Traditional Chinese Medicine - digestion, energy, internal balance
Because healing starts with investigation.
22 Mar 2026
Episode 9: What is the Root Cause of PCOS?
Polycystic Ovary Syndrome (PCOS) is often described as a hormonal disorder—but is that really the root cause?
In this episode of Root Cause CSI™ — Clinical. Scientific. Investigations., Joan Lu breaks down PCOS beyond surface-level explanations and explores what is happening underneath the diagnosis.
You’ll learn why many women are told they have a “hormonal problem,” but may actually be dealing with deeper metabolic and systemic imbalances—especially insulin resistance.
This episode is designed to help you:
• Understand the true root drivers behind PCOS
• Recognize how blood sugar and insulin impact hormones
• See PCOS through a broader, whole-body perspective
• Begin thinking beyond symptom management
Whether you’ve been diagnosed with PCOS, suspect hormonal imbalance, or are simply looking to understand your body better—this episode will give you a clearer, more empowering framework.
🎧 Follow the podcast for more root-cause health investigations
📍 Connect with Joan Lu for functional and culinary medicine education
14 Mar 2026
Episode 8: Endometrial Hyperplasia vs Endometrial Cancer
In this episode of Root Cause CSI™ — Clinical. Scientific. Investigations., Joan Lu discusses the difference between endometrial hyperplasia and endometrial cancer, two conditions that can sometimes appear similar but have very different implications.
Joan also shares a personal experience of being told she had endometrial cancer based on an ultrasound finding, before a biopsy was even performed. The emotional impact of hearing that diagnosis inspired this episode and a gentle reflection on the importance of careful and compassionate communication in healthcare.
This episode reviews:
What the endometrium is
What endometrial hyperplasia means
How it differs from endometrial cancer
Why proper medical evaluation and biopsy are important
Why words matter when communicating serious diagnoses
This episode is intended for educational purposes only and encourages listeners experiencing abnormal uterine bleeding or concerning symptoms to seek appropriate medical evaluation from their healthcare provider.
9 Mar 2026
Episode 7: Endometriosis Through Three Lenses
March is Endometriosis Awareness Month. In this episode of Root Cause CSI™ — Clinical. Scientific. Investigations., Joan Lu explores endometriosis through three different clinical perspectives: conventional medicine, functional medicine, and Traditional Chinese Medicine (TCM).
Endometriosis is a condition that can affect millions of women worldwide, often presenting with symptoms such as severe menstrual pain, pelvic discomfort, fatigue, digestive changes, and fertility challenges. Yet many individuals spend years searching for answers before receiving a diagnosis.
In this episode, we examine how different medical frameworks interpret the condition and what each perspective contributes to our understanding of the body.
Topics discussed include:
Common symptom patterns associated with endometriosis
How conventional medicine explains endometrial lesions and inflammation
Functional medicine insights into hormones, inflammation, gut health, and metabolic factors
Traditional Chinese Medicine concepts such as Blood Stasis and Liver Qi stagnation
Why examining conditions through multiple clinical lenses can offer a broader understanding of health
This episode also includes a brief personal reflection from Joan’s own journey with PCOS and endometriosis.
This podcast is intended for education and awareness only and does not provide medical diagnosis or treatment.
Root Cause CSI™ — Clinical. Scientific. Investigations. explores health conditions the way investigators examine a case — by looking at them through multiple clinical perspectives.
Follow the podcast for more discussions on integrative health, functional medicine, and Traditional Chinese Medicine frameworks.
25 Feb 2026
Episode 6: PCOS Through Three Lenses: Conventional, Functional & Traditional Chinese Medicine
Polycystic Ovary Syndrome (PCOS) is often described as a reproductive disorder — but is that the full story?
In this episode of the Root Cause CSI™ Podcast, Joan Lu, PhD, RN, PHN, BC-FMP explores PCOS through three distinct medical frameworks: Conventional Medicine, Functional Medicine, and Traditional Chinese Medicine.
This episode reframes PCOS as a communication issue between metabolism, stress regulation, and reproductive signaling — not a personal failure.
Educational purposes only. This podcast does not diagnose or treat medical conditions.
20 Feb 2026
Episode 5: Life Begins at 40.
Life doesn’t decline at 40. It recalibrates.
In this episode of Root Cause CSI™ — Clinical Perspectives, Joan Lu, PhD, RN, PHN, BC-FMP shares what truly changes after 40 — metabolically, hormonally, emotionally, and energetically.
From a conventional lens, turning 40 often comes with routine labs and symptom management.
From a functional medicine lens, this is when patterns surface:
• Insulin resistance
• Hormonal shifts
• Micronutrient depletion
• Chronic stress load
From a Traditional Chinese Medicine perspective, this is when Kidney Qi, Jing, and Blood require deeper nourishment.
If you are navigating your 40s (or approaching them), this episode is for you.
🌿 Learn more: www.joanlu.com
🎙 Root Cause CSI™ — Clinical. Scientific. Investigations.
5 Jan 2026
Episode 4: New Year Self-Reflection
Keywords
chronic illness, body signals, nutrition, parenting, health awareness, self-reflection, Root Cause CSI, healing, lifestyle habits, health foundations
Summary
In this episode of Root Cause CSI, Joan Lu explores the hidden causes of chronic illness, emphasizing that diseases do not appear suddenly but are the result of long-term patterns in our lifestyle and environment. She discusses the importance of understanding our body's signals and the role of nutrition in health, particularly in parenting. Joan encourages listeners to reflect on their habits and recognize that awareness is the first step towards meaningful change.
Takeaways
A disease doesn't suddenly start one day.
The body compensates for a long time before showing symptoms.
Aging is not the culprit of chronic illnesses.
Our environment shapes our health long before willpower does.
Eating should not be based on convenience.
Health is about frequency, not deprivation.
Intentional nutrition lays a foundation for health.
Awareness, not urgency, is where change starts.
Your body adapts and recalibrates like a GPS.
Every symptom has a story and every story has a root cause.
Titles
Uncovering Hidden Causes of Chronic Illness
The Body's Signals: Understanding Health Patterns
Sound bites
"Aging is not the culprit."
"Our environment shapes our health."
"Think of your body like GPS."
Chapters
00:00 Introduction to Root Cause Healing
02:58 Understanding Chronic Illness and Body Signals
05:36 Parenting and Nutrition: Building Healthy Foundations
06:50 Awareness and Self-Reflection for Change
17 Nov 2025
Episode 3: Autism Through a Functional Medicine Lens
Autism Through a Functional Medicine Lens
A Story About the Gut, the Brain, and the Hidden Root Causes No One Talks About
In this deeply moving episode of the Root Cause CSI Podcast, Joan Lu shares one of her most unforgettable cases: a 75-year-old father, his autistic son, and the generational fears families quietly carry.
This episode looks at autism through a functional medicine lens.
Not just behaviors.
Not just labels.
But the biology underneath:
• Gut health
• Micronutrient deficiencies
• Mitochondrial dysfunction
• Inflammation
• Detoxification challenges
• Environmental sensitivities
You will hear:
• A mother who sensed something deeper was happening with her child
• A father begging for help as his memory declines
• A son afraid of what life will look like without his father
• How anxiety and sensory overwhelm are connected to the body
• The six major biological patterns often seen in autism
• The child’s transformation through functional medicine support
• The emotional moment when both father and son embraced Joan
• How healing restored calm, confidence, and resilience
This episode offers clarity, compassion, and a new understanding of how autism affects not only the child, but the entire family.
If you are a parent, caregiver, educator, or clinician, this conversation will shift the way you see autism and the path forward.
⸻
Begin your child’s healing journey here:
JoanLu.com
(Comprehensive autism functional medicine program)
15 Nov 2025
Episode 2: Why Most People Never Heal: The Missing Link Called Micronutrient Deficiency
Keywords
cellular starvation, fatigue, biochemistry, hormonal imbalance, mental health
Summary
In this conversation, Joan Lu discusses the concept of cellular starvation, emphasizing that individuals can experience symptoms like fatigue and hormonal imbalances even when they eat regularly. She highlights the role of biochemistry in these issues, suggesting that they are not merely behavioral or personality-related.
Takeaways
Cellular starvation can occur even with daily eating.
Symptoms of cellular starvation include fatigue and irritability.
Biochemistry plays a crucial role in mental health.
Hormonal imbalances can stem from cellular starvation.
Low libido and brain fog are signs of underlying issues.
Inflammation may be linked to biochemistry imbalances.
Understanding your body’s needs is essential for well-being.
Fatigue is not just laziness; it has biochemical roots.
Addressing biochemistry can improve overall health.
Awareness of these issues can lead to better health choices.
Sound bites
"It is cellular starvation even if you eat every day"
"It is usually because of your own biochemistry."
Chapters
00:00 Introduction to Micronutrient Deficiency
00:23 Understanding the Impact of Nutrient Deficiency
00:33 The Limitations of Traditional Lab Tests
5 Sept 2025
Episode 1: Joan Lu's Journey to Functional Medicine
Summary
In the inaugural episode of Root Cause CSI, Joan Lu shares her personal journey into functional medicine, detailing her struggles with PCOS and endometriosis. She emphasizes the importance of lifestyle changes and nutrition in healing, contrasting her experiences with conventional healthcare. Joan advocates for a patient-centered approach that focuses on root causes rather than just symptoms, aiming to empower listeners to take control of their health.
Keywords
functional medicine, integrative medicine, health, nutrition, lifestyle changes, healing, PCOS, endometriosis, patient stories, root cause
Takeaways
Healing starts with investigation.
Joan's journey into integrative medicine was personal.
Conventional medicine often overlooks the role of nutrition.
Lifestyle changes can lead to significant health improvements.
The healthcare system is often reactive rather than preventive.
Patients often feel disempowered by traditional healthcare.
Functional medicine provides tools that conventional medicine not focusing.
Listening to patients is crucial for effective healing.
Education and empowerment are key in health management.
Every symptom has a story that needs to be understood.
Sound Bites
"You will never get pregnant."
"I was told I had endometrial cancer."
"The power of our body can heal on its own."
Chapters
00:00 Introduction to Root Cause CSI
00:26 Joan's Personal Journey into Functional Medicine
03:05 The Turning Point: Lifestyle Changes and Healing
05:27 Frustration with Conventional Healthcare
06:16 The Shift to Integrative Medicine
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