Functional Medicine MD: What 5,000+ Patients Taught Him About Root Cause Medicine

In this episode of Return on Health, we speak with Dr. Peter Martin, physician, former CNS pharmacology researcher, and founder of FunMed, one of Europe’s leading functional medicine clinics.

Peter spent around 15 years in pharmacology research before his own burnout pushed him to look beyond the conventional model of symptom control. What started as a personal search for recovery became a data-driven clinical model built around root cause medicine, extensive biomarker testing, gut health, metabolism, and chronic disease prevention.

We talk about what functional medicine actually means, why chronic disease often needs a different care model, and what Peter has learned from treating more than 5,000 patients. He explains why fasting insulin may be one of the most overlooked markers in modern healthcare, how low-grade inflammation is often connected to gut health, and why normal lab results do not always mean someone is truly healthy.

We also get into the controversial parts: large biomarker panels, false positives, red meat, vegan diets, anti-nutrients, carnivore diets, and the weakness of much nutrition research. Peter also shares why he believes functional medicine could become part of the European healthcare system, especially if reimbursement shifts from visits and procedures toward actual health outcomes.

This episode covers:

• What 5,000+ patients taught him

• Why fasting insulin is often missed

• How root cause medicine could change care

Topics discussed:

00:00 Introduction
01:00 What FunMed does differently
02:00 Real-world data from 5,000+ patients
03:30 From CNS pharmacology to functional medicine
07:00 Root cause medicine vs symptom control
10:30 Precision health in Sweden and Germany
15:30 Why FunMed tests around 200 biomarkers
21:00 False positives and the problem with large panels
28:00 Fasting insulin and insulin resistance
31:00 Low-grade inflammation and gut health
35:30 Low-carb and ancestral nutrition
41:00 Vegan diets, nutrient deficiencies, and bio-individuality
49:30 Red meat, nutrition research, and epidemiology
56:00 Functional medicine and insurance coverage
59:00 Rapid fire: biomarkers, magnesium, carnivore diet, healthcare reform

Guest

Dr. Peter Martin

Physician, former CNS pharmacology researcher, founder of FunMed, and one of the leading voices trying to bring functional medicine and precision health into European healthcare.

Guest links

LinkedIn: https://www.linkedin.com/in/peter-martin-31b23342/
FunMed: https://www.funmed.se/?srsltid=AfmBOorlgUNnEK1ba7p_zIxug35sx3YMSq6PmYiufq6xJH1VAQ-EiQc0

Return on Health is available wherever you get your podcasts.

If you enjoyed this episode, leaving a 5-star rating on Spotify helps us bring more honest conversations about health, longevity, and medicine to more people.

Harvard MD: The Peptide Boom Is Here.. But Is Medicine Ready?

In this episode of Return on Health, Niko and Miguel speak with Dr. Anand Vinjamoori, Harvard Medical School and Harvard Business School trained physician, former founding Chief Medical Officer at Modern Age, advisor to Superpower, and founder of Next Generation Medicine.

Together, they discuss why longevity medicine is booming while many companies still struggle to build sustainable businesses, why peptides may become one of the next major waves in health optimization, and why the future of biomarkers will likely require a much more individualized and data-driven approach.

This episode covers:

The peptide boom and why it matters
Why longevity businesses often fail
What biomarkers can and cannot tell us

Dr. Anand explains why the current medical evidence system may be too slow for the next generation of therapies, how real-world data and patient registries could help close the evidence gap, and why biomarkers should be used with nuance rather than treated as absolute truth. He also shares his view on overhyped interventions, the role of exercise, and the cultural differences between American optimization culture and European lifestyle rhythms.

Key topics

Longevity medicine and market timing
The business challenges behind longevity clinics
Customer acquisition and why messaging matters
The rise of peptides in health optimization
Evidence gaps, real-world data, and patient registries
Personalized medicine and individual risk assessment
Biomarkers, multi-omics, and biological individuality
Why HBA1c can be overinterpreted
Exercise as one of the strongest health interventions
Cold plunges and the problem of overapplied hormesis
European lifestyle culture vs. American optimization culture

Chapters

00:00 The Longevity Paradox
01:03 Building Modern Age and the Early Longevity Market
05:04 Personal Motivations Behind Longevity Medicine
07:57 What Patients Actually Want From Longevity Care
11:39 Why Many Longevity Businesses Struggle
15:12 How Customer Preferences Have Changed
18:21 Peptides as the Next Big Wave
19:07 Peptides, Regulation, and Medical Experimentation
24:24 The Evidence Gap in Peptide Use
30:58 Why Medicine Needs Better Risk Assessment
36:59 Biomarkers and Biological Ground Truth
44:20 Multi-Omics and the Future of Measurement
48:35 Which Biomarkers Are Useful — And Which Are Noise?
52:42 Culture, Lifestyle, and Health Optimization
55:45 Lightning Round: Metrics, Interventions, and Healthcare Reform

Guest

Dr. Anand VinjamooriHarvard Medical School and Harvard Business School trained physician, former founding Chief Medical Officer at Modern Age, advisor to Superpower, and founder of Next Generation Medicine.

Guest links

LinkedIn: https://www.linkedin.com/in/vinjamoori/
Next Generation Medicine: https://www.nextgenerationmedicine.co/
Superpower: https://www.linkedin.com/company/superpower/posts/?feedView=all

Listen now

Return on Health is available wherever you get your podcasts.

If you enjoyed this episode, leaving a 5-star rating on Spotify helps us bring more honest conversations about health, longevity, and medicine to more people.

Most people think aging is something that happens later.

In reality, the processes that determine how you age — and whether you stay functional — start decades earlier.

In this episode of Return on Health, we sit down with Roberta Vella Azzopardi, a geriatrician and geroscientist with a PhD in cognitive frailty, to break down what aging actually looks like in clinical practice.

Instead of focusing on single diseases, this conversation zooms out: Why do people lose independence? What really drives decline? And where are the biggest missed opportunities in prevention?

What this episode covers

• Why modern medicine often intervenes too late
• What frailty really means — and why it matters more than age
• How loss of muscle drives metabolic and cognitive decline
• The concept of peak span and why function beats lifespan
• Why hearing loss is one of the biggest overlooked dementia risk factors
• The massive gap in menopause and women’s health care
• What actually works vs. what’s just hype in longevity

Key takeaways

Frailty is best understood as loss of physiological reserves.
When those reserves drop below a certain threshold, even small stressors can lead to long-term decline.

This is why two people at the same age can look completely different clinically — one independent, one dependent.

A major driver of this process is muscle loss.
Muscle is not just about movement. It directly affects metabolic health, insulin sensitivity, and even brain function. The good news: even later in life, resistance training and sufficient protein intake can still improve outcomes.

One of the most underestimated risk factors discussed in this episode is hearing loss.
It contributes to cognitive decline through increased cognitive load, social isolation, and shared vascular mechanisms — yet remains widely underdiagnosed and undertreated.

Another critical blind spot is women’s health, especially around menopause.
Many symptoms are treated in isolation instead of addressing underlying hormonal changes, leading to years of missed intervention opportunities.

Timestamps

(00:00) Introduction & Roberta’s background
(04:30) Frailty explained: vulnerability vs. age
(11:00) Why prevention starts decades earlier
(16:50) Reversing decline: muscle, protein, training
(21:00) Peak span vs. lifespan
(28:30) Menopause and missed diagnoses
(36:30) Dementia prevention & modifiable risks
(37:00) Hearing loss and cognitive decline
(50:00) Busting common aging myths
(55:00) Lightning round insights

Takeaways

• Start investing in your health early — not when problems appear
• Maintain muscle mass through resistance training and protein intake
• Don’t ignore hearing health — it directly impacts brain health
• Look at root causes, not isolated symptoms
• Prevention is not one intervention — it’s a system

Roberta:
https://www.linkedin.com/in/roberta-vella-azzopardi-md-phd-8235878a/

Return on Health:
https://returnonhealth.de/

Niko:
https://www.linkedin.com/in/niko-hems/
https://www.instagram.com/niko_hems
https://nikohems.de/

Miguel:
https://www.linkedin.com/in/miguel-medina-stanivukovic-857b9720b/
https://www.instagram.com/miguelmedinastanivukovic/?hl=en

Karolinska MD PhD: You Feel Healthy. Your Data Disagrees

Most people think they’re healthy.

But biology doesn’t care how you feel.

Long before symptoms show up, your physiology is already shifting.. and most check-ups won’t catch it.

In this episode, we sit down with Natalia Trpchevska (MD, PhD Karolinska, Medical & Scientific Director at AYUN) to break down what longevity medicine actually looks like when applied properly.

We go beyond surface-level optimization and talk about what actually drives risk: mitochondria, metabolic flexibility, genetics, and why most people are already off track without knowing it.

This episode covers:

• Why longevity medicine still struggles in practice
• Mitochondria, NAD+ and optimization myths
• Biohacking and the future of healthcare

Key takeaways:

• Health declines silently — symptoms come late
• Longevity medicine asks: where are you heading biologically?
• The basics still dominate outcomes — most people underestimate them
• The next level is personalization, not more hacks
• Two “healthy” people can have completely different risks
• Mitochondria adapt first — then they start driving dysfunction
• Most mitochondrial interventions are misunderstood
• Genetics gives probabilities, not certainty
• Real optimization = prioritization + sequencing

About Natalia:

Natalia Trpchevska is a medical doctor and holds a PhD in genetics from the Karolinska Institutet.

She is the Medical & Scientific Director at AYUN in Zurich, where she focuses on applying systems biology and layered diagnostics to detect early shifts in physiology — before disease develops.

Her work bridges clinical medicine and research, with a strong emphasis on translating complex biology into actionable interventions.

Timestamps:

00:00 – Introduction & Natalia’s background (Karolinska, genetics → clinic)
03:30 – Why genetics naturally leads into longevity medicine
05:00 – What longevity medicine actually does differently
07:30 – “Physiology before pathology” explained
09:30 – The basics vs. the real next level
11:30 – Same lifestyle, completely different risk profiles
13:30 – APOE4, Lp(a) and personalized strategy
15:00 – Mitochondria: what actually happens as you age
18:30 – When mitochondrial dysfunction becomes clinically relevant
21:00 – Cause vs. consequence: where mitochondria fit in aging
23:30 – How mitochondrial function is actually measured
26:30 – Why isolated tests don’t work (layered diagnostics)
29:00 – What happens after testing: prioritization & sequencing
32:00 – Why “doing everything” doesn’t work
35:00 – IHHT explained: mechanism, benefits, limitations
38:30 – Risks, contraindications & when it backfires
41:00 – Environment vs. lifestyle: what really drives dysfunction
44:00 – The hierarchy: metabolism → inflammation → toxins
47:00 – Why most people focus on the wrong layer
49:30 – What genetics got wrong over the last decade
53:00 – Polygenic risk, probabilities & real-world use
56:00 – Gene–environment interaction: what actually matters
58:30 – Final thoughts: what people still misunderstand about health

Links:

Natalia:
https://www.linkedin.com/in/natalia-trpchevska/
https://www.ayun.ch/

More about Return on Health:
https://returnonhealth.de/

Niko:
https://www.linkedin.com/in/niko-hems/
https://www.instagram.com/niko_hems
https://nikohems.de/

Miguel:
https://www.linkedin.com/in/miguel-medina-stanivukovic-857b9720b/
https://www.instagram.com/miguelmedinastanivukovic/

Rethinking Primary Care and Longevity: Insights with Dr. Takhar. In this episode, Dr. Takhar, UCLA and Harvard trained physician-scientist shares his journey from emergency and internal medicine to building a groundbreaking primary care model focused on human connection, longer physician-patient times, and personalized longevity strategies. We explore how systemic issues hinder patient-centered care and what reforms could make healthcare more effective, preventative, and humane.

Key topics:

• The limitations of conventional healthcare: burnout, bureaucracy, short visits
• The unique model of Primary MD: small panels, extensive diagnostics, longer consultations
• Human connection as a pillar of effective medicine
• The importance of listening and communication skills in healthcare
• Ethical considerations of concierge medicine and access equity
• The role of diagnostics: lipid panels, advanced markers, and their clinical relevance
• Risks, hype, and evidence in emerging longevity interventions
• Future pathways for systemic reform: data, evidence, insurance, and policy shifts
• Lessons from infectious disease training applied to longevity and longevity safety
• The "Mixed Medical Arts" approach: integrating diverse fields for optimal patient outcomes

Timestamps:

• (00:00) - Introduction to Dr. Takhar and the care collision in modern medicine
• (02:07) - Clinical experiences shaping innovative primary care
• (07:12) - The human component in healthcare and systemic barriers
• (10:53) - What primary MD does differently to foster patient trust
• (13:20) - Teaching patients the 'why' behind health decisions
• (14:17) - The vital role of health coaches in adherence and engagement
• (15:32) - The holistic approach combining diagnostics, trust, and relationship
• (18:07) - Addressing ethics and access in concierge-like models
• (19:36) - How to demonstrate value and scalable models
• (22:37) - Overcoming telehealth technical issues in podcast interviews
• (23:58) - The importance of comprehensive, integrated care strategies
• (26:32) - Membership-based care: structure and patient experience
• (27:33) - Ethical considerations of luxury care and future access
• (36:36) - System change: from volume to value and prevention
• (42:48) - Infectious disease background shaping longevity skepticism
• (46:55) - The dangers of hype and unproven interventions
• (50:32) - Bottom-up demand and the future of preventative medicine

More about Return on Health:

https://returnonhealth.de/

Dr. Sukhjit “Sarge” Takhar:

https://www.linkedin.com/in/sukhjit-takhar-md/
https://www.primary-md.com/

Niko:

https://www.linkedin.com/in/niko-hems/
https://www.instagram.com/niko_hems
https://nikohems.de/

Miguel:

https://www.linkedin.com/in/miguel-medina-stanivukovic-857b9720b/
https://www.instagram.com/miguelmedinastanivukovic/?hl=en

This episode underscores the critical need for systems that prioritize genuine human connection, personalized diagnostics, and thoughtful health promotion to advance longevity and overall well-being.

Longevity science is advancing quickly. Healthcare systems are moving much slower.

In this episode, Stanford-trained physician Dr. Hillary Lin explains why prevention, biological age testing, mitochondria, and health optimization often struggle to translate into real clinical practice. We discuss the limits of NAD+ supplementation, the risks around peptides, and why behavioral change still drives most health outcomes.

The conversation also looks at decentralizing healthcare, continuous monitoring, and why many high performers struggle with recovery despite doing “everything right.”

What you’ll learn

• Why longevity science and healthcare are misaligned
• The role mitochondria play in aging and energy
• When NAD+ supplementation can backfire
• Risks around peptides and self-experimentation
• Why behavior change drives most longevity gains
• The future of continuous health monitoring

Topics

00:00 The gap in longevity care
02:17 Hillary Lin’s path into longevity medicine
05:28 Decentralizing healthcare
08:13 Mental health navigation
14:05 Mitochondria and mitophagy
16:45 The NAD+ problem
22:33 High performer bottlenecks
27:20 Behavior change and longevity
30:31 Peptides in longevity medicine
35:02 Continuous healthcare models
46:19 Biological age testing
51:32 The future of healthcare monitoring

Unlock the secrets to lasting health and longevity with Dr. Rhea Kotecha - a physician bridging functional medicine, longevity, and science to transform the way we age. Discover why metabolic health is the underrated pillar of a long, vibrant life, and learn practical strategies that go beyond quick fixes to create real, sustainable change. If you've ever wondered how to assess your true health potential or how personalized medicine can help you avoid the pitfalls of one-size-fits-all protocols, this episode is your essential guide.

Takeaways

• Longevity is not just about adding years but optimizing healthspan.
• The gap between knowledge and action is where health interventions fail.
• Personalized protocols based on biomarkers are essential for effective longevity strategies.
• Metabolic health is a crucial pillar of healthspan optimization.
• Visualizing future health can motivate clients to adhere to protocols.
• Functional foods can be both beneficial and a marketing gimmick.
• A whole food approach is vital for improving health outcomes.
• Adherence to protocols is often hindered by overwhelming information.
• Medical education should emphasize holistic approaches to health.
• The healthcare system needs to adapt to prioritize healthspan optimization.

Summary

In this conversation, Dr. Rhea Kotecha discusses the multifaceted approach to longevity, emphasizing the importance of understanding healthspan over mere lifespan. She highlights the significance of personalized protocols based on biomarkers, the role of metabolic health, and the need for a holistic view in medical education. The discussion also covers the challenges of adherence to health protocols, the impact of functional foods, and the necessity of visualizing future health to motivate clients. Dr. Kotecha advocates for a shift in the healthcare system towards proactive health management, focusing on optimizing healthspan.

Chapters

00:00 Understanding Longevity: A Multifaceted Approach

02:02 The Intersection of Medicine, Psychology, and Nutrition

04:06 The Role of Psychology in Health Interventions

06:03 Functional Foods: Marketing vs. Reality

08:15 Assessing Longevity: The Importance of Individualization

10:15 Key Biomarkers for Longevity Assessment

11:55 Metabolic Health: The Foundation of Longevity

14:57 Microbiome Testing: Promise and Challenges

19:22 Visualizing Longevity: Engaging Clients in Their Health Journey

23:23 Fermented Buckwheat: A Nutritional Powerhouse

27:00 The Importance of Gut Health and Fermented Foods

28:53 Creating a Balanced Fiber and Protein Blend

33:24 Client Readiness and Longevity Protocols

35:29 Improving Adherence in Medical Protocols

40:45 Navigating Evidence-Based Medicine and Experimental Interventions

45:31 Practicing Longevity Medicine in a Traditional Healthcare System

47:17 Misconceptions About Longevity and Healthspan

49:02 The Anthropological Perspective on Longevity

51:14 Bridging the Gap Between Modern Life and Evolutionary Needs

53:27 Key Interventions for Healthspan Improvement

54:08 Overhyped Longevity Interventions to Avoid

54:53 Future of Personalized Supplementation

55:27 The Role of AI in Longevity Medicine

56:03 Reforming Healthcare Incentives for Longevity

Follow Rhea:
https://www.instagram.com/drrheakotecha/

https://www.drrheakotecha.com/

More about Return on Health:

https://returnonhealth.de/

Niko:

https://www.linkedin.com/in/niko-hems/

https://www.instagram.com/niko_hems

https://nikohems.de/

Miguel:

https://www.linkedin.com/in/miguel-medina-stanivukovic-857b9720b/

https://www.instagram.com/miguelmedinastanivukovic/?hl=en

Keywords

longevity, healthspan, biomarkers, metabolic health, functional foods, personalized medicine, adherence, medical education, evolutionary health, anthropological perspective

This episode digs into why midlife health quietly shapes your future more than most people realize - and why the healthcare system is structurally bad at dealing with that phase of life.

Together with Stanford-trained MD Ali Zaidi, we talk about what actually changes in your body during midlife, which signals people tend to miss, and where medicine often reacts too late instead of setting the right defaults early on.

A grounded conversation about biology, behavior, and why “doing nothing until something breaks” is still the dominant strategy in most health systems.

Takeaways

• Midlife health is crucial
• Preventive care is undervalued in the healthcare system Longevity interventions
• Testing for mid-lifers

Chapters

• 00:00 The Importance of Midlife Health
• 06:02 Physiological Changes in Midlife
• 19:02 Personal Health Stories and Biases
• 28:10 Experimental Approaches in Healthcare
• 36:18 Exploring Red Light Therapy and Vision Health

Follow Ali:
https://www.linkedin.com/in/ali-zaidi-4a81121/
https://www.alizaidimd.com/

More about Return on Health:

https://returnonhealth.de/

Niko:

https://www.linkedin.com/in/niko-hems/

https://www.instagram.com/niko_hems

https://nikohems.de/

Miguel:

https://www.linkedin.com/in/miguel-medina-stanivukovic-857b9720b/

https://www.instagram.com/miguelmedinastanivukovic/?hl=en