Supplements
Research-based supplement buying guides built only from fetched authoritative sources (for example NIH Office of Dietary Supplements, FDA, and independent testing-seal programs) plus official product labels. PickedFitness does not give medical advice, does not invent scores, and does not make disease or treatment claims. Talk to a qualified clinician before starting a supplement.
Explainers
Supplement testing seals explained: NSF, USP and Informed Sport
A seal is a testing program, not an FDA approval and not a reason to take a supplement. This page explains three official marks and how to check them, with no product picks and no doses.
GuideProtein powder: what to look for on the label
This is a buying-criteria page about Supplement Facts panels and third-party marks, not a recommendation to use a protein powder and not a whey-versus-plant comparison.
GuideCreatine monohydrate: what to look for on the label
This is a label-and-testing guide, not a recommendation to take creatine and not a dose. The useful work happens on the Supplement Facts panel and on third-party certification marks.