Health-related content on this site is written and reviewed against a preferred source hierarchy: government and public health bodies first (such as the NHS, EFSA, or NIH Office of Dietary Supplements), then systematic reviews and meta-analyses, then individual randomised controlled trials. We avoid citing marketing claims, brand-commissioned studies presented without context, or forum anecdotes as if they were evidence.
Product data (dose, ingredient form, pack size, price) is sourced directly from the manufacturer's own listing or packaging wherever possible, cross-checked against the retailer listing it is compared on. Where a listing is ambiguous or internally inconsistent, we say so rather than guessing at a number that looks plausible.
Writers and researchers working on this site do not hold a financial interest in the products they write about, beyond the site's own standard affiliate relationships disclosed on every page.
We update pages when we find new information or when a reader flags something - see our Corrections Policy.