Terms of use

Informational use only

Certwell is an information and comparison tool. Nothing on this site constitutes medical advice, a health recommendation, or a suggestion to take any supplement. Always consult a qualified health professional before starting or changing a supplement regimen.

Certwell does not endorse any product, brand, or retailer. The presence of a product in the catalog is not a recommendation to purchase it.

Affiliate disclosure

Some links to UK retailers on this site are affiliate links. Certwell may earn a commission if you make a purchase through these links. This comes at no extra cost to you.

Affiliate relationships do not influence which products appear in the catalog, how products are ranked, or which certifications are reported. Certification status is determined solely by whether the product holds a recognised third-party certification from NSF, USP, Informed Sport, or IFOS.

Accuracy

The catalog is manually curated. Certification status may change after a product has been added — certifications can lapse, be suspended, or be updated by the certification body. Certwell makes reasonable efforts to keep data current but cannot guarantee that all information is up to date at any given time.

For authoritative and current certification status, always verify directly with the relevant certification body:

• NSF Certified for Sport
• USP Verified
• Informed Sport
• IFOS

Liability

Certwell is provided as-is. To the extent permitted by law, Certwell accepts no liability for decisions made on the basis of information on this site, for outdated certification data, or for the content of any third-party site linked from this site.