Free deliveryWhy The Wellness recommends this
Curated, not stocked.
Fatty15 earned its place here because it is one of the few supplement brands whose core ingredient — C15:0 — has a credible, peer-reviewed research trail behind it rather than a marketing story. The science on pentadecanoic acid is still building, but the quality of that early evidence is meaningful. For patients focused on cellular ageing, metabolic resilience, or simply filling a nutritional gap from reduced full-fat dairy intake, this is a considered, evidence-informed choice.
About this product
30 Day Refill
Fatty15 is a daily supplement built around C15:0, also known as pentadecanoic acid — an odd-chain saturated fatty acid that has attracted genuine scientific interest over the past several years. Unlike the more familiar omega-3s or omega-6s, C15:0 is an odd-chain fat, and emerging research suggests it may support cellular membrane integrity, mitochondrial function, and metabolic balance. The 30 Day Refill is designed for existing Fatty15 users who want to maintain their supply without repurchasing the starter kit.
C15:0 is the kind of nutrient that tends to be low in people eating less full-fat dairy, and research into its role in long-term metabolic and cellular health is ongoing. It is studied for its potential to reduce cellular fragility, support red blood cell function, and contribute to broader metabolic markers — areas relevant to anyone paying close attention to their long-term health, not just those managing a specific deficiency.
This refill suits people who have already incorporated Fatty15 into a daily routine and want a consistent, unfussy supply. One capsule a day keeps the commitment minimal. Fatty15 as a brand has been notably research-led since its founding, with its science emerging from work originally conducted for the US Navy. That pedigree sets it apart from the majority of fatty acid supplements on the market, where the evidence base is considerably thinner.
What it does
Benefits
- 01
Supports cellular membrane strength and integrity
- 02
Studied for long-term metabolic health markers
- 03
May support mitochondrial function at a cellular level
- 04
Simple one-capsule daily dose for easy adherence
- 05
Refill format for established Fatty15 users
Get the most from it
How to use
Take one capsule daily. Follow any additional guidance on the packaging. Taking it with a meal is a reasonable habit, as fat-soluble nutrients are generally better absorbed alongside dietary fat.
What's inside
Ingredients
View full ingredient list
C15:0 (Pentadecanoic Acid)
Common questions
Frequently asked
What is C15:0 and why does it matter?
C15:0, or pentadecanoic acid, is an odd-chain saturated fatty acid found primarily in full-fat dairy. It has been studied for its potential role in supporting cellular membrane stability, mitochondrial function, and metabolic health — areas that most standard supplement ranges do not address directly.
Who is this refill suitable for?
It is intended for people already using Fatty15 who want to continue their supply. If you eat very little full-fat dairy, your dietary C15:0 intake is likely low, which is the population the research has tended to focus on.
How long before I might notice a difference?
C15:0 is a nutrient you build up over time rather than something with an immediate acute effect. Most research looks at markers over weeks to months, so consistency matters more than timing.
Is this safe to take alongside other supplements?
C15:0 is a fatty acid rather than a pharmacologically active compound, so interactions with common supplements are not a known concern. That said, if you are on prescription medication — particularly lipid-related therapies — it is worth checking with your GP before adding any new fatty acid supplement.
Why buy the refill rather than the starter kit?
The refill is designed for those who already have the Fatty15 capsule format and simply need to top up their monthly supply. Check the packaging to confirm capsule count and any differences from the starter kit.
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