Scientists Just Discovered the Essential Nutrient That DOUBLES Dolphin Lifespan—But Should YOU Take It? | Stephanie Venn-Watson
Dave Asprey
Mar 27, 2025
Episode description
For nearly a century, scientists believed we had discovered ALL of the essential fatty acids the human body needs. But what if they were wrong?
Stephanie Venn-Watson, a veterinary epidemiologist and longevity researcher, joins Dave to reveal a groundbreaking discovery—a newly identified essential fatty acid, C15, that may hold the key to healthier aging and even longer lifespans. Originally uncovered in an unlikely place—U.S. Navy dolphins that were outliving their wild counterparts by decades—this forgotten fat is now shaking up the scientific community.
So why hasn’t anyone told you about it?? Decades of misguided dietary advice stripped this crucial nutrient from our food system, leaving an entire generation unknowingly deficient. Even worse, pregnant women have been some of the MOST hurt from this cruel change to our modern diet. Now, cutting-edge research is proving that C15 plays a critical role in cellular stability, mitochondrial function, and total mental health.
What You’ll Learn in This Episode:
• The first new essential fatty acid discovered in nearly 100 years—and why it matters
• How dolphins led to one of the BIGGEST breakthroughs in human nutrition
• Why the removal of C15 from our diets is accelerating aging
• The surprising connection between C15 and mental health
• How this “missing” fat could outperform some of the biggest longevity drugs today!
• What foods naturally contain C15—and should you supplement it?
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Resources:
• Dave Asprey’s New Book - Heavily Meditated: https://daveasprey.com/heavily-meditated/
• Fatty15 Instagram – https://www.instagram.com/fatty15/
• Fatty15 Website: www.fatty15.com
• 2025 Biohacking Conference:
Mindsip insights from this episode:
Address iron overload as a potential symptom of C15 deficiency
Dysmetabolic iron overload syndrome in humans may be a symptom of C15 deficiency, as the lack of C15 makes red blood cells fragile and leads to iron accumulation in the liver.
Address C15 deficiency to slow aging process
A deficiency in the essential fatty acid C15 can lead to a form of cell death called ferroptosis, which accelerates the aging process.
Choose grass-fed dairy for higher C15 content
Dairy from grass-fed cows contains twice as much of the beneficial fat C15 as dairy from corn-fed cows.
Choose fermented butter for enhanced nutrient absorption
The fermentation process in cultured butter cleaves fatty acids into their free, more bioavailable form, increasing their absorption.
C15 surpasses leading longevity drugs in cellular studies
In head-to-head studies on cellular models, C15 has been shown to outperform leading longevity drugs like rapamycin, metformin, and acarbose.
Differentiate between beneficial odd-chain and harmful even-chain saturated fats
Odd-chain saturated fats like C15 are beneficial, while common even-chain saturated fats like C16 and C18 can be pro-inflammatory.
Ensure adequate C15 for newborn health and allergy prevention
A mother's C15 deficiency is passed to her baby through breast milk and is linked to a higher risk of allergies and type 1 diabetes in the child.
Leverage C15 to enhance sleep, mood, and pain relief
Your body converts C15 into a molecule called PDC, which is a full-acting endocannabinoid that may improve sleep, mood, and pain.
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