In this episode of The Heart to Heart podcast, host Dr. Mike Hart interviews Alex Leaf, an independent nutritional researcher renowned for debunking nutritional misinformation on social media. The discussion covers topics such as the benefits of collagen for skin health, the potential advantages of ketogenic diets for athletes, and the truth behind various nutrition myths including the effects of soy on testosterone and semen retention. Alex also shares his insights on intermittent fasting, ideal protein intake, and the debate over seed oils. The conversation concludes with their thoughts on cardiovascular health markers and the relevance of particle size in LDL cholesterol.

Alex Leaf is an independent nutritional researcher, scientific communicator, and educator specializing in human health and performance. With a decade of experience translating complex science into actionable insights, Alex rose to prominence as a researcher and writer at Examine.com before joining Ari Whitten's Energy Blueprint. His work spans peer-reviewed publications—including contributions to the ISSN position stand on ketogenic diets—and teaching in the Master's program in Human Nutrition and Functional Medicine at the University of Western States.

Follow him here: Website: alexleaf.com Instagram: @AlexJLeaf

Links:

• IVF and Abstinence Studies

• Systematic Review on Ketogenic Diets in Athletes

• Whey Protein vs. Beef Protein

Show Notes:

• 00:00 – Welcome back to the Hart2Heart Podcast with Dr. Mike Hart

• 02:30 – Collagen and skin health

• 08:30 – Ketogenic diets for athletes

• 14:00 – Protein intake for athletes

• 18:00 – Intermittent fasting vs caloric restriction

• 25:00 – Seed oils: myths and facts

• 30:00 – Semen retention: debunking the myths

• 35:00 – Soy and hormones

• 38:30 – Soy consumption and hormonal effects

• 39:30 – Whey protein: benefits and misconceptions

• 42:30 – Post-workout nutrition myths

• 45:00 – Insulin sensitivity and carbohydrate timing

• 54:00 – Protein intake strategies

• 57:00 – Calories and diet composition

• 57:14 – "A calorie is a calorie, but depending on your diet's composition, you'll absorb and utilize very different amounts of calories from food."

• 01:01:00 – Debating dietary approaches

• 01:05:00 – Cardiovascular health markers

• 01:12:00 – Conclusion and contact information

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The Hart2Heart podcast is hosted by family physician Dr. Michael Hart, who is dedicated to

cutting through the noise and uncovering the most effective strategies for optimizing health,

longevity, and peak performance. This podcast dives deep into evidence-based approaches to

hormone balance, peptides, sleep optimization, nutrition, psychedelics, supplements, exercise

protocols, leveraging sunlight light, and de-prescribing pharmaceuticals—using medications only when absolutely necessary.

Beyond health science, we tackle the intersection of public health and politics, exposing how

Policy decisions shape our health landscape and what actionable steps people can take to reclaim control over their well-being.

Guests range from out-of-the-box thinking physicians such as Dr. Casey Means (author of "Good Energy") and Dr. Roger Sehult (Medcram lectures) to public health experts such as Dr. Jay Bhattacharya (Director of the National Institutes of Health (NIH) and Dr. Marty Mckary

(Commissioner of the Food and Drug Administration (FDA) and high-profile names such as

Zuby and Mark Sisson (Primal Blueprint and Primal Kitchen).

If you're ready to take control of your health and performance, this is the podcast for you. We cut through the jargon and deliver practical, no-BS advice that you can implement in your daily life, empowering you to make positive changes for your well-being.

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