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Science Says!

N—134

C15:0’s Multi-Tier Approach to Healthy Aging

May 18, 2025

Welcome to Issue 134 of Science Says! Our weekly newsletter where you’ll learn the latest healthy aging and C15:0 research news that our team of doctors, scientists, and experts are most excited about—without having to go search for it.

Eric and Steph
Co-Founders, Doctors, Nerds

stephanie

What Dr. Stephanie Venn-Watson, our co-founder and author of The Longevity Nutrient and over 80 peer-reviewed scientific publications, is reading.

Healthy Aging

A New Home Run Study for C15:0

Mid-last year, we published evidence of a nutritional C15:0 deficiency condition called Cellular Fragility Syndrome in the peer-reviewed journal, Metabolites. This is the first nutritional deficiency syndrome to be identified in 75 years, and may be affecting as many as 1 in 3 people globally. More importantly, we showed how C15:0 supplementation fixes this syndrome. A new extensive study from an independent team put Cellular Fragility Syndrome to the test. This week, let’s dive into what this team found (spoiler alert: C15:0 got an A+).

Amazing! What is Cellular Fragility Syndrome?

Good question. While C15:0 does a lot of good things, one of its most important jobs is to strengthen our cell membranes against age-driving lipid peroxidation.

C15:0 is a sturdy fatty acid that readily integrates into our cell membranes. Since it has no double bonds (bonds that are particularly susceptible to attack by oxygen), C15:0 helps to keep our cells protected and functioning – especially as we age.

If we don’t get enough C15:0 from our diet or supplements, our cell membranes become more fragile, resulting in:

  • Increased lipid peroxidation.
  • Increased fragility of red blood cells, reflected by lower hemoglobin and higher red blood cell distribution width (RDW).
  • Ferroptosis, a new form of cell death caused by fragile fatty acids in cell membranes.
  • Dysregulated iron metabolism & immune function throughout the body, starting with the liver.
  • Accelerated age-related breakdown, including impaired liver, metabolic, heart, and cognitive function.

The good news is that our C15:0 levels are directly related to our dietary C15:0 intake. Which means that, like all nutritional deficiencies, Cellular Fragility Syndrome can be readily fixable by raising our C15:0 levels.

Got it. What was the purpose of the latest study?

Well, Aabis et al. put pure C15:0 to the test. Specifically, they used a rodent model with liver lipid peroxidation, cell death, dysregulated iron metabolism and immune function, and impaired liver function (aka induced Cellular Fragility Syndrome)… and sought what daily oral C15:0, at three different doses, could fix within 10 weeks.

And the outcomes were…

Many good benefits. Compared to the non-supplemented poorly functioning control group, the C15:0 supplemented group (especially the lower 10 mg/kg body weight dose group) demonstrated the following statistically significant benefits:

  • Healthier body weight
  • Lower lipid peroxidation
  • Lower RDW and higher intracellular hemoglobin concentrations (markers of stabilized red blood cells)
  • Improved cell survival and increased glutathione, a protector against ferroptosis
  • Restored healthy iron metabolism, including stemming harmful liver iron deposition
  • Lower multiple proinflammatory cytokines
  • Lower AST, ALT, and GGT (aka improved liver function)

Just as we had shown in the Metabolites publication (that C15:0 supplementation reverses all components of ferroptosis and Cellular Fragility Syndrome), Aabis et al. repeated – perfectly.  Go science.

Mounting evidence of C15:0 as a healthy aging protector.

This latest research adds to 100+ peer-reviewed studies demonstrating how C15:0 strengthens cell membranes and reverses aging-related breakdown at the cellular level, resulting in:

  • Lower lipid peroxidation levels. Previously, Wei et al. showed that C15:0 supplementation lowers liver lipid peroxidation, while Soboleva et al. demonstrated lower lipid peroxidation levels in people with higher C15:0.
  • Supported red blood cell health, liver, metabolic, heart, and cognitive health. Numerous studies, including Robinson et al.’s randomized placebo-controlled clinical trial, have shown that C15:0 supplementation can improve red blood cell and liver health. Further, population-based studies have repeatedly demonstrated that people with higher C15:0 levels have better red blood cell, liver, metabolic, heart, and cognitive health. Beyond association, we know that C15:0 has direct, key activities that explain how C15:0 works (like activating AMPK, AKT, and PPARs… while inhibiting mTOR, HDAC, JAK-STAT, FAAH, and MAO-B).
  • Targeted mechanisms that promote healthy iron metabolism and stave off ferroptosis. By armoring red blood cell membranes against breakdown, C15:0 keeps iron where it should be (the blood) and out of where it shouldn’t (our liver, pancreas, heart, and brains).
  • Lowered proinflammatory cytokines. As the ultimate body calmer, C15:0 lowers 18+ proinflammatory cytokines.

The bottom line? Whether it’s our own Office of Naval Research-funded studies, or other research from independent teams throughout the world, pure C15:0 is consistently showing up as a healthy aging super star.

Stay tuned for the latest and greatest C15:0 science here at Science Says! and have a wonderful week, everyone!

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