- Does no certification mean the product is unsafe?
- No. Absence of certification means the product has not been independently verified by NSF, USP, Informed Sport, or IFOS. Many supplements without these certifications are perfectly fine. Certification adds assurance — it is not proof of safety or a requirement for a good product.
- How is the data kept up to date?
- The catalog is manually curated. Certification status is reviewed periodically, but it may not always reflect the latest status from the certification body. For the most authoritative and up-to-date information, check the certification body directly using the links on the Certifications page.
- How do affiliate links work, and does this affect which products are shown?
- Some links to UK retailers are affiliate links. Certwell may earn a small commission if you buy through them, at no extra cost to you. Affiliate relationships do not influence which products appear in the catalog or how results are ranked. Products are listed based on certification status and search relevance, not commercial relationships.
- Which certifications does Certwell cover?
- Certwell currently covers four certification bodies: NSF Certified for Sport, USP Verified, Informed Sport, and IFOS (for fish oil). See the Certifications page for a full explanation of what each one tests for.
- Can I suggest a product to add?
- Yes. Email contact@certwell.co.uk with the product name and a link to its listing on the certification body's website. We review suggestions periodically and add qualifying products once verified.