In this groundbreaking episode, Dr. Gabrielle Lyon sits down with Dr. Tobias Kohler, a professor of urology at the Mayo Clinic, to discuss a topic most people are afraid to talk about: men's sexual health.

Dr. Kohler shares eye-opening insights, backed by over two decades of clinical experience and research, on the powerful link between foundational health habits and male sexual function. They reveal why erectile dysfunction is a critical "check engine light" for heart disease and how building muscle and exercising can improve not just your erections, but your overall longevity.

This conversation goes beyond simple fixes, providing actionable, science-based information that every man needs to hear.

This episode is brought to you by:

• Puori - Get 20% off sitewide with code DRLYON → https://puori.com/DRLYON
• Cozy Earth - Use code DRLYON for up to 40% off - https://cozyearth.com
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Chapters

0:00 - Link between muscle mass & erections

0:52 - Erectile function

1:13 - The truth about penis size & penile implants

2:32 - The foundational pillars of men's health

8:48 - Erectile dysfunction is an early sign of heart disease

16:14 - The role of anxiety, alcohol & cannabis on ED

24:29 - The "use-it-or-lose-it" organ

29:31 - The truth about PDE5 inhibitors (Viagra & Cialis)

46:46 - The "C"s of urinary frequency

54:43 - The connection between muscle, testosterone & sexual function

1:02:07 - Is there a point of no return for penile health?

Erections: A “Check Engine Light” for Your Health

One of the most striking points from the discussion was Dr. Kohler’s perspective on erectile dysfunction (ED). He described it not just as a sexual problem, but as one of the earliest "check engine lights" for heart disease. The blood vessels leading to the penis are much smaller than those in the heart. As we age, plaque can build up in these vessels. This process, known as atherosclerosis, affects the smaller vessels first.

This means if you're experiencing persistent issues with erections, it's a strong indicator that you may have vascular problems that could soon affect your heart. As Dr. Kohler put it, "If the penis is failing, you should assume you're going to have problems with your heart soon until proven otherwise." The good news is that anything good for your heart—like exercise and a healthy diet—is also good for your penis.

The "Use-It-or-Lose-It" Organ

The conversation also tackled the surprising phenomenon of penile shortening. When the penis goes into a "garage" for an extended period—meaning there is a consistent lack of erections—it can lose length. Dr. Kohler shared that a consistent lack of erections for just three months can lead to a loss of 1-2 centimeters in length due to the formation of scar tissue. This is why he calls the penis a "use-it-or-lose-it" organ. The key to maintaining penile health is to exercise the penis through erections, and tools like a vacuum erection device can be used for penile rehabilitation.

Muscle Mass, Testosterone, and Sexual Function

For many men, this is where the conversation gets personal. Dr. Kohler highlighted the direct correlation between muscle mass and erectile quality. Studies show that men with more muscle mass have better erections and higher testosterone levels. The reverse is also...

Are you struggling to get a good night's rest?

Do you think you can thrive on just a few hours of sleep? In this eye-opening episode, Dr. Gabrielle Lyon sits down with renowned sleep scientist Dr. Rebecca Robbins to debunk the biggest sleep myths and reveal the profound connection between sleep and your health, longevity, and daily performance. They dive into the science of sleep, from the homeostatic sleep drive to the crucial role of your circadian rhythm. You’ll learn why sleep isn't just a passive state for your brain and discover the shocking truth about "social jet lag" and how hitting the snooze button is sabotaging your day.

In this episode, we cover:

• Why sleep is your ultimate longevity accelerator and its impact on cognitive health and Alzheimer's.
• The dangers of sleep deprivation and how it affects your blood pressure, emotional regulation, and appetite.
• Actionable, evidence-based tips for improving your sleep, including the best time for naps and the surprising truth about sleep medication.
• The fascinating inner workings of your brain during different sleep stages, including deep sleep and REM sleep.
• The connection between your environment, exercise, and sleep quality.
• The future of sleep science and the exciting role of technology in tracking and improving your rest.

The top 3 sleep myths you need to stop believing right now!

This conversation will change the way you think about sleep, empowering you to prioritize rest and unlock your full potential.

This episode is brought to you by:

• LMNT - Free sample pack with any purchase at https://drinklmnt.com/DRLYON
• Timeline - Get 20% off your order at https://timeline.com/LYON
• MUD\WTR - Use code DRLYON to get up to 43% off your starter kit at https://mudwtr.com/DRLYON
• Needed - Use code DRLYON for 20% off your first order at https://thisisneeded.com

Chapter Markers:

0:00 - Introduction & The Ultimate Accelerator of Good Health

0:10 - Sleep is a Product of Two Processes

0:30 - The Sleep Medication vs. Behavioral Change Debate

1:18 - The Importance of Sleep

2:21 - The Best Productivity Hack

3:16 - The Evolution of Sleep Science

5:52 - How Much Sleep Do We Really Need?

8:54 - The Two Processes That Drive Sleep

12:38 - Circadian Rhythm & Social Jet Lag

15:01 - Can You Repay Sleep Debt?

18:54 - What Happens to Your Brain When You Sleep?

20:10 - The Gold Standard of Sleep Measurement

22:35 - REM Sleep: The "Software Update" for Your Brain

26:42 - How to Find Your Child's "Sweet Spot"

30:32 - Navigating Jet Lag & Travel

33:10 - A Deep Dive into Melatonin

38:03 - The Impact of Exercise on Sleep

43:31 - The Power of Naps

47:01 - Tips & Tricks to Improve Your Sleep

50:18 - How to Create a Bulletproof Routine

58:50 - The Impact of Regular Sleep on the Brain

1:03:00 - Sleep Medication: The Pros and Cons

1:04:30 - The Future of Sleep Science

1:08:58 - The Top 3 Sleep Myths Debunked

1:12:35 - The Final Takeaway

Disclaimer: The Dr. Gabrielle Lyon Podcast and YouTube are for general information purposes only and do not constitute the practice of medicine, nursing, or other professional health care services, including the giving of medical advice, and no doctor/patient relationship is formed. The use of information on this podcast, YouTube, or...

Mysterious symptoms. Confusing diagnoses. Years of being dismissed.

In this episode, Michelle Shapiro joins me to unpack the often misunderstood and overlooked world of mast cell activation syndrome (MCAS), histamine intolerance, postural orthostatic tachycardia syndrome (POTS), and hypermobility conditions.

Drawing from her own health journey and experience with thousands of clients, Michelle unpacks why conventional medicine often overlooks these complex, overlapping conditions—and how a root-cause, systems-based approach can lead to real healing. From nervous system regulation to low-histamine nutrition, this episode is a must-listen for anyone struggling with unexplained chronic symptoms.

You’ll learn:

• What MCAS is and why so many people are misdiagnosed
• The link between MCAS, POTS, and connective tissue disorders
• How nervous system regulation impacts immune reactivity
• Which foods trigger histamine flares and how to build a low histamine diet
• The surprising connection between hormones and histamine
• Why building muscle is critical for recovery from MCAS, POTS, and hypermobility

Whether you’re a clinician or someone living with these symptoms, this conversation offers insight, hope, and a roadmap forward.

Who is Michelle Shapiro?

Michelle Shapiro, RD is a functional/ integrative Registered Dietitian who has helped over 3,000 clients transform their health over the past 11 years. As the founder of an NYC-based virtual private practice, Michelle leads a team of six expert nutritionists who specialize in complex cases including histamine issues, gut dysfunction, chronic anxiety, and weight concerns. She is the creator of the viral Histamine Essentials Webinar, which is available now on replay, and the host of the top-rated podcast Quiet the Diet, where she breaks down the science behind chronic illness in a way that actually makes sense and makes you feel seen. Michelle is the go-to expert for people who have tried everything and are ready for a real plan.

This episode is brought to you by:

• OneSkin - Get 15% off with the code DRLYON – https://www.oneskin.co
• Ned - Get 15% off with code DRLYON – https://helloned.com/DRLYON
• Beef.org – Your go-to resource – https://BeefItsWhatsForDinner.com
• LMNT - Get your free LMNT Sample Pack with any purchase – https://DrinkLMNT.com/DRLYON

Find Michelle Shapiro at:

• Instagram - https://www.instagram.com/michelleshapirord
• Histamine Webinar Replay - https://michelleshapirord.com/histamine-webinar
• Apply to work with Michelle’s team: https://airtable.com/appzFCkAqbbL4J2Qu/pagw0ynsqYbBzMjes/form

Find Me At:

• Instagram:@drgabriellelyon
• TikTok: @drgabriellelyon
• Facebook: facebook.com/doctorgabriellelyon
• YouTube: youtube.com/@DrGabrielleLyon
• X (Twitter): x.com/drgabriellelyon
• Apply to become a patient – https://drgabriellelyon.com/new-patient-inquiry/
• Join my weekly newsletter – https://institute-for-muscle-centric-medicine.ck.page
• Get my book – https://drgabriellelyon.com/forever-strong/

Timestamps:

00:00 – Introduction: Dismissed symptoms and hidden syndromes

01:43 – What is mast cell activation syndrome (MCAS)?

03:33 – Why histamine is the “loudest” chemical messenger

06:39 – MCAS symptoms: from flushing to anxiety

08:22 – Root causes: mold, toxins, and the “bucket” theory

11:15 – Diagnosing MCAS: blood, urine, and biopsy challenges

15:11 – Food patterns: how "healthy" foods trigger MCAS

16:53 – MCAS vs histamine intolerance: what’s the difference?

25:06 – High-histamine foods: what to avoid (and why)

27:37 – Nervous system & immune system: the feedback...