Start with identifiable information
A useful product comparison identifies the exact product, preparation, serving, and source of the information. If a current label has not been checked, our text should say so. Missing ingredient amounts must remain missing rather than be estimated.
Assess claims at the right level
Ingredient studies do not automatically establish an effect for a finished formula. Preparation, amount, participants, study design, and outcome all affect the relevance of a citation. We avoid promised cures, guaranteed results, unsupported approval claims, and fabricated ratings.
Use attributable references
Nutrition and ingredient guides link to public health references where relevant. These sources explain general evidence and do not endorse the products appearing here. Some catalog entries contain limited information and should be used as prompts for label verification.
Purchases and commercial relationships
Retailers control current pricing, availability, shipping, subscriptions, and returns. Some outgoing purchase links are affiliate links. Inclusion does not imply that a product has been independently tested, reviewed by a clinician, or certified by this site.
Updates and corrections
The updated date describes changes to the page, not a new clinical finding. Important comparisons should be checked again against a current manufacturer label before purchase. Where a catalog record lacks enough information, it is kept out of search indexing until it can provide a useful comparison.
Updated · Editorial approach