Summary
Lucas Aoun interviews Stephanie Venn-Watson, the researcher who discovered pentadecanoic acid (C15:0) through studying longevity biomarkers in dolphins. Venn-Watson explains how C15 was unexpectedly found to predict the healthiest aging dolphins instead of the expected omega-3s. The conversation covers the cell-based studies showing C15:0 activates AMPK and inhibits mTOR, population studies linking higher C15 levels to reduced metabolic disease risk, and the development of Fatty15 as a supplement. The episode examines whether C15:0 qualifies as a newly discovered essential fatty acid.
Key Points
- C15:0 (pentadecanoic acid) was discovered as a longevity biomarker in dolphins, not omega-3s as expected
- The primary dietary source of C15:0 for humans is butter and whole dairy fat
- Cell studies show C15:0 activates AMPK and inhibits mTOR, pathways associated with longevity
- Population studies consistently link higher C15:0 levels to lower rates of type 2 diabetes and heart disease
- Fatty15 was developed as a pure C15:0 supplement after the dolphin discovery
- The finding that a saturated fat promotes health was initially surprising and required extensive validation
- C15:0 is an odd-chain saturated fatty acid, distinct from the even-chain saturated fats typically studied
Key Moments
Discovery of C15:0 in dolphins surprised researchers
Venn-Watson describes how C15:0, not omega-3s, predicted the healthiest aging dolphins, a surprising discovery given their fish-based diet.
"and to look for which molecules might predict the healthiest aging dolphins. And lo and behold, you know, we thought it would be omega-3s because of their fish diet. And lo and behold, there was surprising discovery of C15, the saturated fat that predicted the healthiest aging dolphins. Yeah, and that's spectacular. I mean, I haven't really looked into the literature around like understanding longevity biomarkers in different animal species, but I guess..."
C15:0 found in butter and whole dairy fat
The discussion reveals that the primary human dietary source of C15:0 is butter and whole dairy fat, making the saturated fat finding even more surprising.
"two things. So the first thing, you know, Lucas was like, okay, we'll see if our primary source of C15 as humans is butter and whole, you know, dairy fat. So, and it's a saturated fat. So that made it a very surprising finding, which also meant we needed to do a lot more science to play this out, right? And say, well, it's association, it's a causation. So from there, we were really able to"
From association to causation - validating C15:0
Venn-Watson explains the scientific journey from observing C15:0 associations to conducting studies to determine whether it causes health benefits.
"focusing on a very unique type of fatty acid called pentadecanoic acid. Now, I know that's a bit of a mouthful, but we have the lovely Stephanie Van Watson on the podcast here. Stephanie, welcome to the podcast. Hi, Lucas. It's great to be here. Awesome. So maybe, Stephanie, do you want to let my audience know a little bit about, I guess, your line of work and I guess your background into like health optimization? Yeah."
