Use this calculator to plan how many fatty15 capsules and bottles you’ll need for a given time period. Enter the price of the bottle you are looking at to see your cost per day.
C15:0 Dosage & Cost Calculator
Based on the labeled dose options for fatty15. You set the bottle price and size.
Enter the bottle price you see to get your own numbers.
Estimate only – worked out from the price and bottle size above. Prices change; check the current price before buying.
Why no height/weight input? Unlike per-kg supplements (creatine, protein), C15:0 has no published bodyweight-adjusted dosing in the research behind it. This calculator doesn't fabricate a per-kg formula that doesn't exist in the literature.
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The 100–200 mg/day dose range used in this calculator comes directly from the fatty15 product label and from the human circulating-concentration research behind it, not from a per-kilogram formula. The foundational 2020 study proposing C15 as a potential essential fatty acid found that higher circulating levels, not higher doses scaled to body size, tracked with lower rates of cardiometabolic disease and mortality [1].
A 2023 follow-up compared C15’s cell-based activity to established longevity compounds like rapamycin, metformin, and acarbose, again using fixed dose concentrations rather than weight-adjusted ones [2]. A more recent mechanistic review describes how pentadecanoic acid is metabolized through propionyl-CoA and the TCA cycle, and functions as a dual PPAR-alpha/delta agonist [3] — none of which point to a dosing formula tied to height or weight.
That’s why this tool asks for your target daily dose and time period rather than your body stats: as of 2026, no published research ties C15 dosing to bodyweight the way it’s established for compounds like creatine or protein. If that research changes, this calculator will be updated to reflect it.
References
- Efficacy of dietary odd-chain saturated fatty acid pentadecanoic acid parallels broad associated health benefits in humans: could it be essential?. Scientific Reports, 2020
- Pentadecanoic Acid (C15:0), an Essential Fatty Acid, Shares Clinically Relevant Cell-Based Activities with Leading Longevity-Enhancing Compounds. Nutrients, 2023
- Molecular and cellular mechanisms of pentadecanoic acid. PubMed, 2025