About Certwell

What it is

Certwell is a UK-focused tool for finding supplements with recognised third-party certifications and comparing where to buy them from UK retailers.

It exists because certification data is fragmented. Certification bodies publish separate lists, UK retailers do not make certification status easy to filter, and there is no single place to compare certified options and UK availability. Certwell brings that together.

What it is not

• —Not medical advice. Certwell is an information and comparison tool. Nothing here should be taken as a recommendation to take any supplement.
• —Not a retailer. Certwell does not sell supplements. It links to UK retailers where you can buy them.
• —Not a certification body. Certwell does not test or certify products. It surfaces certification status from NSF, USP, Informed Sport, and IFOS.
• —Not exhaustive. The catalog is manually curated. Absence of a product does not mean it is uncertified — it may simply not have been added yet.

Affiliate links

Some links to retailers are affiliate links. Certwell may earn a commission if you make a purchase through them, at no extra cost to you. This does not influence which products appear in the catalog or how they are ranked. See the terms of use for full details.