How much C15:0 is in each capsule?

Each capsule has 100 mg of C15:0. The label suggests 1 to 2 capsules daily, giving 100 to 200 mg.

How long does one bottle last?

A 30-capsule bottle lasts 30 days at one capsule a day, or 15 days at two. The three-bottle kit covers about 90 days at one a day.

Is Fatty15 vegan and dairy-free?

Yes. It is listed as vegan, dairy-free and gluten-free, so it delivers C15:0 without dairy fat.

Does Fatty15 have published research behind it?

C15:0 has been studied in observational and early clinical work, but large trials on health outcomes are still lacking. Treat the cellular-aging claims as preliminary.

Is $36.05 a good price?

That is the best new price among 6 stores as of November 8, 2026. Check the capsule count, since a single bottle and a multi-bottle kit are not comparable.

A single bottle holds 30 capsules. The Starter Kit adds a reusable glass bottle, and the 60-day refill ships two 30-capsule containers.

Where is the Fatty15 Advanced Formula cheapest?

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

Where can I buy the Fatty15 Advanced Formula?

6 stores we checked sell it, including Lionheart Longevity, Amazon, Catalyst Store, fatty15, austin-skin-wellness.myshopify.com.

Fatty15 Advanced Formula

Best price now

$36.05at eBayObserved at 3:13 PM

76% under what the other stores charge

Compared across 6 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission.

Visit eBay

Ask our agent about this product

It checks today's price at every store, compares the alternatives and answers in about a minute.

Our take on the Fatty15 Advanced Formula

Fatty15 Advanced Formula is a vegan C15:0 (pentadecanoic acid) supplement sold as 30-capsule bottles, with a three-bottle 90-day kit and a 60-day refill option. Each capsule carries 100 mg of C15:0, and the label suggests 1 to 2 capsules daily, so a bottle lasts 15 to 30 days. It is marketed for cellular and mitochondrial support rather than for a specific deficiency. The best new price is $36.05 at eBay as of November 8, 2026, with 6 stores listing it new.