Product Description
Pentadecanoic acid, known as C15:0, is a fatty acid your body needs but can't manufacture well on its own. Endurance training puts steady mechanical and oxidative stress on the same cell membranes this fatty acid helps reinforce, and most athletes have never heard of it.
Fatty15 delivers a single, third-party tested dose of the essential fatty acid C15:0 to support cell membrane and mitochondrial health during heavy training.
One Pure Ingredient – Fatty15 contains a single active ingredient, pure pentadecanoic acid, inside a plant-based capsule. There's nothing else in the formula to interact with the rest of your stack or complicate a nutrition plan already built around protein, electrolytes, and recovery work.
Cell Membrane Support for Heavy Training – C15:0 is a structural fatty acid that helps reinforce cell membranes, the same membranes that take a beating from repeated hard efforts, heat exposure, and oxidative stress. Most recovery supplements chase inflammation after a hard session. This one works on the membrane itself.
A Different Angle on Cellular Health – Most recovery supplements target inflammation after the fact. C15:0 supports the structural integrity of the cell membrane itself, a different mechanism than antioxidants or omega-3s.
C15:0 engages pathways your body already uses to manage energy and repair, including AMPK, which helps regulate how cells produce and use energy, and mTOR, a pathway tied to cell growth and repair. Early research also links higher C15:0 blood levels to metabolic and cardiovascular markers that sit within a normal, healthy range, though most of that work is observational, pointing to an association rather than proof that a capsule moves those numbers on its own.
The better-established piece is structural. C15:0 helps stabilize the fatty layer in your cell membranes, which matters most to anyone putting consistent stress on those cells through training.
How to Use Fatty15
Dose: Take 1 to 2 capsules daily, with or without food. Most people start with one capsule and move to two once they know how their body responds. Take it at the same time each day and give it several weeks before you judge how you feel.
Supplement Facts
Starter Kit
Serving Size: 1 Capsule
Serving Per Container: 90
| Amount Per Serving | ||
|---|---|---|
| % Daily Value* | ||
| FA15™ (Pentadecanoic Acid) 100mg | ** | |
* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
** Daily Value (DV) not established
Always Happy Promise: Don't like a product? Tell us within 30 days of receipt and we'll make it right and make you happy. Here at The Feed, we want you to love your experience and the sports nutrition products you purchase. If, for any reason, you are not satisfied with your nutrition specific purchase, tell us.
We do not accept returns on food items that have been opened, but we will issue a store credit if you are unsatisfied. In the event of a return, you must first contact us before sending back a return shipment.
Consumable products over $40 receive a 50% store credit. This includes specialty nutrition products such as ketones or supplements/vitamins.
fatty15 C15:0 Fatty Acid Supplement FAQ's
Everything you need to know before getting started.
Take it once daily, with or without food, at a time you'll stick with consistently. Some people start with one capsule and move to two once they gauge their response.
C15:0 works as a steady nutritional input, not a fast-acting stimulant. Give it several weeks of consistent daily use before evaluating any change.
It's a fatty acid your body needs but doesn't produce well on its own. It occurs naturally in small amounts in whole dairy fat and some fish, and Fatty15 delivers it in a purified, vegan capsule.
Fatty15 is a single-ingredient formula with no stimulants, so it layers easily alongside omega-3s, NAD+ boosters, or a standard recovery stack.
Yes. The capsule is plant-based cellulose, and the formula is free of dairy, gluten, soy, corn, and animal byproducts.