Supplement$119.95 at Fatty15 (90-day subscription)

Pure C15:0 in tiny daily capsules; 70% report better sleep and energy within 16 weeks

Fatty15 is pentadecanoic acid (C15:0)—a saturated fatty acid that strengthens cell membranes and supports mitochondrial repair. The 90-day starter kit gives you 100mg ReCellience15™ (pure C15:0) per capsule, taken daily with or without food. Backed by 100+ peer-reviewed studies and 10+ years of Navy research, though the "cellular aging" claims lean optimistic.

Evidence

3/5

Observational studies, particularly the PREDIMED cohort and others, show associations between circulating C15:0 levels and reduced cardiovascular and metabolic disease risk. However, no randomized controlled trials have directly tested C15:0 supplementation in humans, and the evidence relies on biomarker associations rather than intervention outcomes. The mechanistic plausibility is established, but causality remains unproven.

Mechanism

Pentadecanoic acid (C15:0) is an odd-chain saturated fatty acid that may enhance mitochondrial function and improve insulin sensitivity through activation of peroxisome proliferator-activated receptors (PPARs) and modulation of lipid metabolism. It is also incorporated into cell membranes and may influence metabolic signaling pathways.

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Pure C15:0 in tiny daily capsules; 70% report better sleep and energy within 16 weeks

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One of these every Sunday.