Why you can trust the ratings
Take credentials off the table and the question gets simple: is the method sound, and can you check it? On both counts, yes.
- One method, every product: the same scoring system across a category, so two products are always judged on the same terms.
- Primary sources only: manufacturer specs, certification listings (NSF, OEKO-TEX, GREENGUARD), published third-party testing, and recall databases like CPSC and Prop 65.
- Shown, not asserted: open any product page and each score links straight to the evidence behind it, so you can check the reasoning yourself.