The Unexpected Dolphin Discovery That May Hold the Key to Longevity | Dr. Stephanie Venn-Watson

Mark Hyman

Mar 26, 2025

Episode description

What if the key to aging well had been hiding in plain sight—inside our cells, our food, and even… dolphins? That’s exactly what Stephanie Venn-Watson, DVM, a veterinary epidemiologist, discovered while studying dolphins in the U.S. Navy’s marine mammal program. She found that some dolphins were aging significantly slower than others, leading to the discovery of C15:0—a newly recognized essential fatty acid that supports cellular health, fights inflammation, and may even slow the aging process. In this episode of The Dr. Hyman Show, we dive into:

How studying dolphins led to the discovery of C15:0 as the first essential fatty acid found in 90 years.

Why a deficiency in this nutrient could be accelerating aging and chronic disease.

How C15:0 strengthens cell membranes, reduces inflammation, and promotes longevity.

The connection between diet, metabolic health, and optimal aging.

What you can do to ensure you’re getting enough of this essential fatty acid.

This groundbreaking discovery could change how we think about nutrition and longevity.

View Show Notes From This Episode

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Mindsip insights from this episode:

Supplement C15 to reverse fatty liver markers

A clinical trial showed that C15 supplementation in young adults with a history of fatty liver disease lowered their liver enzymes and improved red blood cell health.

#C15

#fatty-liver

Surpass longevity drugs with C15 benefits

In human cell system studies, C15 demonstrated more longevity-enhancing benefits than rapamycin, metformin, and acarbose, without the associated side effects.

#C15

#longevity

Leverage gut microbes to produce C15 for metabolic benefits

Certain gut microbes can produce C15 from inulin, a prebiotic fiber, which may explain some of the metabolic benefits of a high-fiber diet.

#C15

#gut

Activate dual-action longevity switch with C15

C15 activates the AMPK pathway like metformin and inhibits the mTOR pathway like rapamycin, targeting two primary longevity regulators with a single molecule.

#C15

#longevity

Choose supplementation over dairy fat for better health outcomes

While dairy fat is the primary dietary source of C15, it makes up only 1% of the fat, with over 40% being pro-inflammatory fats, making supplementation a purer option.

#nutrition

#supplement

Discover C15, a newly essential fatty acid for health

C15 is the first essential fatty acid to be discovered in over 90 years, and its deficiency leads to a newly defined condition called cellular fragility syndrome.

#C15

#fatty-acid

Discover C15 as key to healthy aging in Navy dolphins

Researchers discovered that C15, not omega-3s, was the top molecule predicting healthy aging in a population of long-living Navy dolphins.

#aging

#C15

Discover Sardinian Blue Zone secret: high C15 levels from Pecorino cheese

Residents of Sardinia, a Blue Zone, have exceptionally high C15 levels, which is linked to their high consumption of local goat and sheep cheese like Pecorino.