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⏳ Unlock the future of aging—because your cells deserve the best.
Fatty15 C15:0 Pentadecanoic Acid is a cutting-edge healthy aging supplement featuring a patented, pure essential fatty acid discovered after 90 years. Delivering 3x the cellular benefits of omega-3, it supports metabolic, cognitive, immune, liver, brain, and heart health by targeting six hallmarks of cellular aging. Designed for daily use, this 3-month supply offers a science-backed, vegan-friendly formula that enhances cellular strength, mitochondrial function, and restorative sleep—empowering millennials to age smarter and thrive longer.










| ASIN | B0DNBL1D2J |
| Best Sellers Rank | #5,367 in Health & Household ( See Top 100 in Health & Household ) #35 in Omega 3 Nutritional Supplements |
| Brand | Fatty15 |
| Brand Name | Fatty15 |
| Container Type | Bottle |
| Customer Reviews | 4.3 out of 5 stars 842 Reviews |
| Flavor | Unflavored |
| Item Form | Capsule |
| Manufacturer | Fatty15 |
| Manufacturer Part Number | FA15-K-90-AMZ |
| Number of Items | 1 |
| Package Information | Bottle |
| Primary Supplement Type | Pentadecanoic Acid |
| UPC | 850064163520 |
| Unit Count | 90 Count |
J**E
Waited on this review just to see that it actually works
I am 67 years old and been taking almost a month. I do open the capsule up every morning and put powder in my mouth with a good glass of water. Don't like plastic going in my system. Anyway product is effective for me at least no side effects, most of joint pain has gone. Seen improvements in my skin and energy level, definitely sleep better! Size is small but since I open the capsule it doesn't matter. Simple to use after I take it with water, I take my vitamin liquid that way I know everything is being absorbed! It is pricey and I definitely don't like that they want you to have a subscription which I won't. Yet I will probably pay the full price to keep using it because the benefits for me are there!
P**P
The Capsule That Changed My Sleep
Fatty15: This Tiny Capsule Changed the Way I Sleep Some supplements build trust slowly, their benefits showing up only on lab tests. Others are felt instantly, woven into your day-to-day experience. Fatty15, intriguingly, is both. At the heart of this minimalist capsule is C15:0, a pure, vegan-friendly odd-chain fatty acid—and the first new essential fatty acid to be discovered in nearly a century. Identified while its founder was studying dolphins, C15:0 has since emerged as a powerful tool for modern health. Its science is compelling: it helps regulate circadian rhythms, balancing the body’s internal clock. In my case of one, the result was deeper, more restorative sleep . Beyond sleep, C15:0 supports cellular health, fortifies fragile membranes, and boosts mitochondrial function—the very engines of our energy. I tried Fatty15 after reading about it, noticed nothing immediate, and so when i finished the bottle I didn’t repurchase it. Within days, I realized something was missing. Not insomnia exactly, but the deep sleep I had grown used to had evaporated. I returned to the supplement, and with it came back those long, unbroken stretches of rest. Fatty15 is not marketed as a sleep aid, yet its subtle power lies there for me. It is rare to find a supplement that strengthens cells, supports mitochondria, and just might return you to the kind of sleep you thought was behind you. Sometimes the smallest capsule contains the most profound shift.
B**E
Try it. I think it has changed my life.
I have taken it for a few months. And this is one vitamin pill that I can feel the difference. I rate very few products. I am in my 70s and can really feel the difference. I am not paid to give this review. I have never taken any vitamin that I felt a difference. I know that it is spendy. But if you can afford - I think you will be surprised. I take lots of vitamins and this helps an old guy. More than the rest!
A**R
1 year update Push past the headaches, take in the morning, decreased mood swings after week 7-8
1 year update- after 6 months taking this I still felt good, but I did not feel the same clarity and light energy I felt for the first 4 months. My bloodwork still looks great 1 year later. At month 9 they came out with gummies that are 1/2 the potency of this formula, so I started to suppplment them in to raise the dosage and I did feel really good again in about 3 weeks. I recommend the gummies- even the kids version of gummies to give a little boost. At month 10 I had a lot of life things happening and I stopped taking all supplements entirely including of course this one. Within 3 weeks, the dry scaly patch on my foot came back with a vengance with some heel callus that almost entirely went away after a literal lifetime since just a little kid. I found to need more body moisturizer and my dry eye raged— I never stopped having dry eye but apparently this was helping it… my clarity and energy only slightly dipped which surprised me, so maybe this has some carryover. Here I am at month 11 1/2 just starting to take this again and I already see and feel the scaly dry patch on my foot starting to decrease slightly again….. This is is worth it to me. ———- 4 month October update- I had blood work and my HDL is very high (this is the good cholesterol). My sleep has mostly leveled out and the last 2 nights I had minimal red wake ups(according to my watch). I am still sleeping less, but I am not generally tired. I still have an even energy during the day and my focus has stayed even. No flashes- almost zero mood swings- no morning wake up ‘rage”. The other thing I noticed was I usually have callus on my heels that I work at constantly with creams, buffing, soaking… I’m shocked but I do not have a callus anymore—I’ve not tried any new creams or supplements so I’m going to take a leap and say this is hydrating my skin better? Also, this is a 3 month supply, so basically $40 a month… still quite high- but I’m finding it worth it going into month 4. Original review: The TLDR: try to push past the 1-2 weeks of headaches if you get them, take in the morning , noticeable energy/alertness at about 3-4 weeks, calmer affect overall at about week 7-8. Sleep decreases and may change, but it doesn’t effect my day…. I have been taking this for 3 months. I read up on PA and it was in my cart waiting for a sale. I picked it up on prime day in July for a deep discount. I cannot believe the difference I feel, overall. I already take an excellent fish omega, bovine collagen, marine collagen, vitamin d w/ k2, vitamin,in e and a biotin/hair skin and nails and Gaia liquid Ashwaganda pill. I added nothing new to my routine, except this. The first week I really didn’t feel a difference. Week 2 and 3 I kept getting really strong headaches in the afternoon and I wasn’t sure if it was allergies, or this. I read a few reviews that they were getting bad headaches. I was about to stop taking this but the headaches went away. Moving into a month and a week or so, I started to notice I wasn’t crashing in the afternoon, I felt like I had more alertness and energy— but not Ina creepy caffeine way. Just steady , non-anxious, alertness. I have not felt like that in a long , long time so it was actually a switch for me, and I found myself wanting to take a light walk rather than taking a 15-30 min nap on the weekends or slogging through the afternoon work day. Is this what the average person feels like? It gets even more interesting… So moving into week 7-8 I started falling asleep at night fairly easy, and I didn’t feel like I needed to take some magnesium glycinate to help me sleep. But this is where it gets strange also- I am in peri so moods and flashes can come on really strong. I started to notice that I wasn’t waking up with this “rage” feeling I would sometimes get from peri…. And it got better- I wasn’t mood shifting nearly as often as I normally would- and then I wasn’t mood shifting at all— like completely maintaining a calm, focused day. I just can’t believe it. This is the only change I have made since July. But— there’s always a but— I am sleeping less at night. Before taking this I would average 7.5-8.5 hours of sleep, and still be tired. Now I am averaging 6.5-7.5 and my watch shows that my sleep is all over the place — a lot of waking (I think due to flashes) longer REM which I found interesting, and longer core/deep sleep despite all of the red spikes of waking up. So, I’m sticking with this for another 3 months to see how things go. I haven’t taken blood work yet, but I am curious to see where my levels are.
A**R
I must have and try you will not regret it
I started taking this about a week ago never knew much about it. A friend recommended it. It is absolutely the best product. I would highly recommend it. It makes you feel amazing. Helps your stomach issues if you have any however I ordered it here on Amazon and I paid too much because if you go on their website, it’s way cheaper.
P**A
Side effects not worth the hype!
After one month of usage I felt a dramatic change in body temperature causing me to sweat, my skin was clammy and I was miserably hot 24/7 in spite of my air conditioner being at a very low setting. I purchased six months worth of it since most supplements, including this one, require consistency before any positive results are effective. Prior to placing my order, I checked with the Amazon Customer Service in the Philippines, if in the event I should get an adverse effect after the 30 day window would this be covered for a refund? I was repeatedly assured I can return/refund my order. That was not a true statement and I was misled. Amazon will not accept my return and credit since in my case I went over the return policy by one day. Be very careful when you order this product. I do not recommend it. The side effects I experienced are not acceptable and not worth going through. I can’t wait till this product is out of my system so I can feel normal again.
C**N
It's like a miracle
I will definitely continue to keep on auto delivery. It took about 3 weeks to notice how much better I was feeling. It has helped me stay regular and I can see wrinkles softening. Best supplements I've bought in years.
A**R
Didn’t see approvement.
I was excited, read that it took 3 months to “kick in”. After 2 months my dry skin cleared up. It was great. The month after, the 3rd month the dry skin came back. Maybe not something Fatty was responsible, who knows. Expensive but figured I’d give it a try. I did, didn’t see much if any improvement so I’m done.
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