The Essential Fat You Didn’t Know You Needed

26 Mar 2025 · 65 min
1:05:10

In this 2025 Rooted in Wellness podcast, host Mona Sharma interviews veterinary epidemiologist and Navy‑funded researcher Stephanie Venn‑Watson about C15, an odd‑chain saturated fatty acid that the team has identified as the first essential fatty acid discovered in over 90 years. The conversation covers the discovery of C15 through metabolomic analysis of long‑lived Navy dolphins, the definition of “cellular fragility syndrome” (a C15‑deficiency‑driven metabolic syndrome that includes insulin resistance, fatty liver disease, chronic inflammation and a novel form of cell death called phoroptosis), and the epidemiological evidence linking low C15 levels to higher risk of type 2 diabetes, heart disease, cancer and accelerated biological aging in humans. Stephanie explains the biochemical actions of C15 – membrane stiffening, resistance to lipid peroxidation, activation of longevity‑related receptors (PPAR‑α/δ, AMPK, inhibition of mTOR and JAK‑STAT), mitochondrial repair, and its conversion to the endocannabinoid pentadecanoyl‑L‑carnitine (PDC). The interview also details sources of C15 (whole‑fat dairy, grass‑fed animal products, certain fish), the prevalence of deficiency (estimated 1 in 3 people), testing options (fatty‑acid panels, at‑home blood‑spot test via Genova Diagnostics), and the clinical trial data showing improvements in liver enzymes, cholesterol, gut microbiome, and epigenetic age after 12‑week supplementation with the proprietary “Fatty 15” product. Stephanie and Mona discuss practical lifestyle tips (sleep, resistance training, mindful eating, grounding practices), the broader movement to relabel fats, push for industry transparency of C15/C16 ratios, and the vision of integrating C15 into infant nutrition and food supply. The episode ends with rapid‑fire advice and a call to action for listeners to explore the supplement, read the upcoming book, and support the C15 awareness campaign.

Questions this video answers

At least 0.2% of the fat in cell membranes (speaker claim).

Speaker estimates that as many as 1 in 3 people may have C15 deficiencies.

The speaker says the discovery of this essential fatty acid was in 2020.

Genova Diagnostics (blood spot at‑home test partnership).

A 12‑week clinical trial (young adults with fatty liver history) reported that raising C15 above the deficiency threshold improved red blood cell strength and lowered ALT and AST; two of three participants were initially C15 deficient (speaker-reported).

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