How long does the Fatty15 Refill last?

The kit holds three bottles of 30 capsules, a 90-day supply at the suggested one capsule a day.

How much C15:0 is in each capsule?

Each capsule provides 100 mg of pentadecanoic acid (C15:0). The label allows one to two capsules daily.

Is Fatty15 vegan and gluten-free?

Yes. The capsules are listed as vegan, dairy-free and gluten-free.

When will I notice a difference?

The brand's survey found most customers who reported benefits did so within 16 weeks, so give it a few months.

Is the refill cheaper than buying single bottles?

The three-bottle kit's best new price is $36.05 at eBay as of November 8, 2026. Compare that per-bottle cost against single-bottle listings before buying.

Can I get C15:0 from food instead?

C15:0 occurs naturally in whole-fat dairy and some fish. If you eat those regularly, ask whether a supplement adds anything for you.

Where is the Fatty15 Refill cheapest?

At eBay, for $36.05, 76% under what the other stores charge, as of our latest check.

Where can I buy the Fatty15 Refill?

7 stores we checked sell it, including Lionheart Longevity, Wild & Well: A Wellness Emporium, Amazon, Your Holistic Doc, fatty15.

Fatty15 Refill

Q: What do buyers say about the Fatty15 Refill?

Buyers like: More than 70% of surveyed customers reported seeing or feeling benefits within 16 weeks; Reported better sleep; Reported support for energy production.

Best price now

$36.05at eBayObserved at 3:13 PM

76% under what the other stores charge

Compared across 7 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission.

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Our take on the Fatty15 Refill

Fatty15 Refill is a three-bottle kit of the C15:0 (pentadecanoic acid) capsule supplement, a 90-day supply at one capsule a day. Each capsule carries 100 mg of the fatty acid, which the brand markets for cell membrane and healthy-aging support. The kit's best new price is $36.05 at eBay as of November 8, 2026, with 7 stores listing it new.

What reviewers say

Buyer feedback cited by the seller is survey-based: more than 70% of surveyed customers reported seeing or feeling benefits within 16 weeks. Reported effects center on sleep, energy, mood and general well-being.

What people mention

SleepPraisedSurveyed buyers reported better sleep after taking it.
EnergyPraisedBuyers reported support for energy production.
MoodPraisedSome surveyed customers reported a healthier mood.
Time to benefitMixedReported benefits came within 16 weeks, which is a long wait for some.
EvidenceMixedThe healthy-aging claims rest mostly on brand-backed science and self-reported surveys.

About the Fatty15 Refill

Fatty15™ Advanced Formula Extra Strength is a patented, high-dose, and science-backed C15:0 (pentadecanoic acid) supplement, exclusively provided by healthcare professionals, to optimize healthy aging. C15:0 is the first essential fatty acid to emerge in over 90 years, and fatty15™ was developed by doctors and scientists to support cell membranes against lipid peroxidation and support healthy aging at the cellular level.* Fatty15™ Advanced Formula Extra Strength provides 150 to 300 mg daily dosing of pure pentadecanoic acid (C15:0), the first essential fatty acid to emerge in over 90 years. Fatty15™ supports cell membranes against lipid peroxidation to support healthy aging at the cellular level.* In addition to supporting cells against aging-related breakdown, the pure and highly bioavailable C15:0 ingredient in Fatty15™ Advanced Formula Extra Strength has multiple dose-dependent cellular benefits relevant to supporting healthy aging and longevity, including activating AMPK, inhibiting mTOR, and supporting mitochondrial function.*Fatty15™ Advanced Formula Extra Strength Benefits†:· Protects cell membranes against age-driving lipid peroxidation*· Supports healthy aging at the cellular level*· Supports metabolic health*· Supports red blood cell health*· Has 36+ cellular benefits relevant to:· Liver health*· Cognitive health*· Immune balance*· Glucose control* Fatty15’s cellular activities, including inhibiting MAO-B and FAAH, also support healthy dopamine and endocannabinoid levels to support healthy aging.* In a survey of 6,243 fatty15 customers, more than 70% reported seeing or feeling benefits within 16 weeks, including better sleep, supporting energy production, healthier mood, and overall health.* †Backed by Competent and Reliable Scientific Evidence (CARSE), based on independent, third-party experts.