This nutrient may ‘reverse’ signs of aging and the reviews have us intrigued

Not all heroes wear capes — some have flippers.

Or, at least, such was the case when researchers began observing dolphins in the U.S. Navy’s Marine Mammal Program, and found that the healthiest, longest-living dolphins had higher levels of a key nutrient now known as C15:0.

C15:0, or pentadecanoic acid, is an odd-chain saturated fatty acid that acts similarly to omega-3s, with proposed benefits for metabolic, cognitive, liver, immune and red blood cell health.

Levels of C15:0 naturally decline with age, but it can be obtained through diet or supplementation. A 2023 study revealed that people with higher circulating C15:0 concentrations had a lower risk of aging-associated conditions. 

That dolphin discovery — paired with further scientific research — helped inspire the widely sought-after Fatty15 capsules. Now, a decade later, this once-a-day supplement is backed by over 100 peer-reviewed studies and over 60 patents.

According to the brand, it has over 100,000 active subscribers. The $119 capsules contain 100 milligrams of pure C15:0, and users report a range of benefits, with some even claiming it helped turn back their biological clocks.

Fatty15 Original Capsules

New York Post Composite

One person who took Fatty15 daily for six months believes her lab results confirmed it was working.

“My six-month bloodwork results were nothing short of amazing improvements. My biological age went from being one year older than my actual age to eight years younger than my actual age!” she shared in the reviews section, adding that she will be continuing with the supplement.

She’s not alone in reporting impressive results. Others say Fatty15 has improved their joint pain, energy levels, sleep quality and even made their hair, skin and nails look healthier. In a survey of 6,243 customers, 70% reported feeling or seeing benefits within 16 weeks of taking the supplement.

Longevity experts have also backed the science behind the supplement’s varied benefits.

“One of my favorite longevity-boosting supplements… Fatty15 acts as an armor for your cells, strengthening cell membranes, repairing mitochondria, and reversing the hallmarks of aging…” explained Dr. Mark Hyman, Functional Medicine Physician and NYT Best Selling Author.

Each batch of the supplement is third-party tested for quality and purity, and claims are backed by Competent & Reliable Scientific Evidence (CARSE). Currently, users can save 20% when they choose the 90-day subscription plan.

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This article was written by Miska Salemann, New York Post Commerce Writer/Reporter. As a health-forward member of Gen Z, Miska seeks out experts to weigh in on the benefits, safety and designs of both trending and tried-and-true fitness equipment, workout clothing, dietary supplements and more. Taking matters into her own hands, Miska intrepidly tests wellness products, ranging from Bryan Johnson’s Blueprint Longevity Mix to the viral Oura Ring to Jennifer Aniston’s favorite workout platform – often with her adorable toddler by her side. Before joining The Post, Miska covered lifestyle and consumer topics for the U.S. Sun and The Cannon Beach Gazette.