90 Day Refill

Key Benefits

• Provides C15:0 (pentadecanoic acid).

• Patented, purified ingredient.

• Fish-oil-free formulation.

• Provides 90-day supply.

Fatty15 is a daily supplement that provides pure C15:0, also called pentadecanoic acid. C15:0 is an odd-chain saturated fatty acid found naturally in small amounts in certain foods. Research has shown it may meet the criteria of an essential fatty acid, meaning the body needs it but cannot produce enough on its own. 

Fatty15 contains a purified, patented form of C15:0, developed for stability and consistent intake. Unlike some fats, C15:0 is resistant to oxidation, which helps it remain stable over time. Studies have explored how dietary C15:0 contributes to maintaining normal fatty acid levels in the body.

Taken daily, this simple capsule offers a practical way to supplement essential dietary fats as part of a balanced routine.

C:15 can be found in most foods, but it is typically mixed with much higher levels of pro-inflammatory fatty acids. Fatty15 stands apart by providing a pure, patented, and bioavailable form of C15:0, without the additional fats commonly found in dietary sources. Developed through extensive scientific research, this award-winning ingredient offers a consistent and controlled way to supplement C15:0. It’s a single-ingredient formulation rooted in purity, quality, and research integrity.

Fatty15 was founded by Dr. Stephanie Venn-Watson and Dr. Eric Venn-Watson, whose backgrounds in veterinary epidemiology, public health, and military medicine inspired a new approach to wellness. Their work with marine mammals led to the discovery of fatty acid C15:0 (FA15™), which became the foundation of the brand’s innovation. Built on scientific research and a shared vision for progress, Fatty15 reflects a commitment to bridging science and everyday wellbeing.

With our Healf Curation Process, we do the work for you. Shop with confidence knowing that every item has been tried, tested, and curated for you.

Learn more about each step—Brand Discovery, Expert Validation, and Community Testing—here.

FA15™ (Pentadecanoic Acid), Vegetable Cellulose Capsule

Take 1 capsule a day.

Additional Information:

Food supplements and foods sold by Healf should not be used as a substitute for a varied, balanced diet and healthy lifestyle.

If you are pregnant, breastfeeding, have a medical condition, or are taking any medications, please consult with a healthcare professional before use. Use products only if the seal is intact. Store in a cool, dry place, out of the reach of young children. Do not exceed the recommended daily intake.

We make every effort to ensure that product information on our website is accurate and up to date, but packaging and ingredients may occasionally vary from images shown on site. Please refer to the product label and contact Healf before use if you have any questions regarding your specific allergies or intolerances.