C15:0 (pentadecanoic acid) is a healthy odd-chain saturated fatty acid. Fatty15’s co-founder, Dr. Steph Venn-Watson, discovered that C15:0 is not only a good fat, but that C15:0 meets the rare criteria of being the first essential fatty acid to be discovered since omega-3, which was over 90 years ago.

In extensive peer-reviewed studies, C15:0 has been shown to support metabolic, heart, liver and immune health, as well as naturally activate receptors in our bodies that deepen sleep, reduce anxiety, and improve joint comfort.

Essential fatty acids are nutrients that our bodies need to maintain baseline health but can't make. That means we must get these essential fats from our diet or supplements. Today, there are three known essential fatty acids: alpha-linolenic acid (an omega-3), linoleic acid (an omega-6), and now, C15:0. Because C15:0 has been shown to have 3x more cellular benefits than omega-3, C15:0 is emerging as the essential, essential fatty acid.*

Our primary food-based source of C15:0 is whole fat cow’s milk, which contains trace amounts of C15:0. Dairy fat, however, contains much higher levels of pro-inflammatory even-chain saturated fatty acids (C16:0), as well as a wallop of calories. Food-based C15:0 is also tied up in complex lipids called triacylglycerides that make C15:0 less bioavailable.  We developed fatty15 to help consumers get >99.5% pure C15:0 in a vegan-friendly, science-backed and readily bioavailable form. No cows or calories needed.

Fatty15 (C15:0) is an odd-chain saturated fatty acid, while omega-3s are polyunsaturated fatty acids. While both are beneficial fats that support healthy immune responses, they also have very different roles. For example, fatty15 is a sturdy fat that strengthens our cell membranes and protects them against age-driving lipid peroxidation. In contrast, omega-3s are less stable fats that make our cell membranes flexible but more susceptible to oxidation, especially as we age. The bottom line: Our bodies use both C15:0 and omega-3s to stay healthy, and they can and should compliment each other. The upsides of fatty15 with pure C15:0? Tiny pills with no smell, no taste, and no burps. Better yet, when tested head-to-head against pure EPA, fatty15 had 3x more cellular benefits relevant to our immune, metabolic, heart, and liver health. We recommend working with your healthcare provider to determine what supplement stack is best for you.

Learn more about fatty15 compared to omega-3s.

Fatty15 is an award-winning and science-backed C15:0 supplement that supports your long-term health, including your liver health, at the cellular level. Numerous studies have shown that both adults and children with higher C15:0 levels have better liver health. Beyond association, fatty15 has been shown to directly protect the liver in relevant models. Specifically, fatty15 is a PPAR-ɑ/δ agonist that promotes liver health by improving the resilience of cell membranes, calming immune responses, and slowing the production of unhealthy liver tissue.* Learn more about fatty15 and your liver health byclicking here.

Today, more than 50 peer-reviewed scientific studies have linked C15:0 (aka, pentadecanoic acid) to better metabolic, heart, immune and liver health. Our >99.5% pure, vegan-friendly C15:0 fatty acid in fatty15 rebalances our metabolism naturally by 1) activating PPAR-alpha and delta receptors, the master orchestrators of our metabolism, 2) activating AMPK pathways, which regulate glucose, 3) repairing mitochondria and enabling our cells to generate energy. Heck, that’s a bunch of much-needed benefits to help keep our metabolism balanced.*

Learn more about the deep science behind C15:0.

Yes! We've teamed up with Genova Diagnostics to offer the Fatty15 C15:0 Test, which measures your C15:0 levels. This test helps you assess whether you have a C15:0 nutritional deficiency or at sub-optimal C15:0 levels. Learn more