Correction & update policy

Why corrections happen

Supplement brands change formulas, doses, and sourcing without much public notice, and new research is published regularly. Between our monthly re-checks, we rely partly on readers to flag anything that looks outdated or wrong.

How to report an issue

Use our contact page and select "Correction request." Include the article or product name and, where possible, a link to the source that supports the correction.

• Factual errors are corrected as soon as they're verified.
• Formula or dosing changes are reflected in the review, with a note on when the update was made.
• Disagreements about interpretation of a study are reviewed by our research editor before any change is made.

What we won't change

We don't adjust a review score in response to a request from the brand being reviewed, or in exchange for advertising consideration. Score changes only follow the criteria in our review process.