Independence
Editorial decisions are made by our editors using the published methodology. Affiliate status, commission rates and brand requests have no effect on placements or tiers. Brands can send us labels, certificates and prices; we review them under the same rules as everything else.
Sourcing
- Product facts come from the brand's product page and Supplement Facts panel, or a named retailer, on a recorded date.
- Health statements are checked against primary sources: the NIH Office of Dietary Supplements, peer-reviewed trials and systematic reviews. We link to PubMed, PMC, DOI or publisher pages, not marketing blogs.
- We cite sources next to the claims they support.
Health claims
We distinguish magnesium's established roles in the body from limited evidence that supplements change specific outcomes. We don't say magnesium glycinate cures or treats insomnia, anxiety, cramps or any disease. We describe the size and certainty of the evidence, not just whether a study was positive.
Review process
Each page is written and fact checked by Jason Bakken, Editor, and reviewed for scientific accuracy and appropriate caution by Doug Phitzinger, MS, Sports Medicine. Privately shared lab reports (tier 2) are checked by a second reviewer against the exact product, formula and period.
Updates and corrections
We check prices monthly, testing documents quarterly and the science annually. Every material change is logged with its date on our corrections page.