For years, omega-3s have been the go-to “good fats,” but recently, I came across something new: pentadecanoic acid, or C15:0. At first, I hadn’t even heard of it. As a dietitian, I’ve spent years reading about fats, but this one flew under the radar. And yes, it’s a saturated fat, which makes people pause—but hear me out: not all saturated fats are bad, and this one might actually be good for you.
Why C15:0 is Interesting
The research is still early, but it’s promising. C15:0 may help reduce inflammation, fight microbes, and even protect against certain cancer cells. It could support brain health, keep your liver and gut happy, and help regulate cholesterol and blood sugar. Some studies even suggest it could play a role in longevity by helping keep cells and mitochondria healthy.
What caught my attention most? Low levels of this fatty acid may be linked to higher risks of heart disease, diabetes, iron overload, and fatty liver disease. That’s reason enough to pay attention.
How to Get It
C15:0 naturally appears in butter, full-fat dairy, fatty fish, animal fats, and some algae. But for those of us avoiding animal products—or just wanting an easier option—there’s a vegan supplement called Fatty15.
I decided to try it for two weeks. The packaging is simple and clean, but more importantly, it was easy to fit into my routine: one or two capsules a day. In that short time, I felt steadier energy, slept better, and noticed my skin looking clearer—no side effects at all.
Nothing dramatic happened overnight, but the subtle improvements and the research behind it made me excited to keep going. Other users report similar benefits: better sleep, improved mood, more focus, and even steadier blood sugar
MY TAKE
I have to admit, I was a bit skeptical when I first heard about pentadecanoic acid. Another “new” fat? And a saturated fat at that? My first thought was, “Great, something else to keep track of in nutrition.” But the more I read about C15:0, the more intrigued I became. Unlike the saturated fats we’ve been told to avoid for years, this one seems to actually do something good—supporting energy, metabolism, and overall wellbeing.
Taking Fatty15 was incredibly easy. One or two capsules a day slipped into my routine without me even thinking about it. And over the course of a couple of weeks, I started noticing little things. My energy felt steadier during the day. My skin looked clearer. And there was just this quiet sense of vitality I hadn’t felt before. It wasn’t a dramatic transformation, but it was enough to make me keep going.
What really gets me excited, though, is the long-term potential. Nutrition science is always changing, and sometimes it’s the small discoveries—like this one—that quietly shift the way we think about health. C15:0 is one of those discoveries. For anyone curious about supporting their body and longevity in small, manageable ways, this is worth checking out.
Honestly, I think that’s the biggest takeaway: caring for your health doesn’t always mean making huge, sweeping changes. Often it’s the small, consistent actions—the tiny habits we stick with—that actually make the biggest difference over time. I’m genuinely curious to see how continuing with C15:0 will affect my energy, my skin, and just the way I feel day to day.
