ConsumerLab.com [1] has been doing independent tests of health products for over 20 years. Like Consumer Reports, they take no advertising money and are support

ConsumerLab.com [1] has been doing independent tests of health products for over 20 years. Like Consumer Reports, they take no advertising money and are supported by subscriptions. They do things like measure which vitamin brands actually contain the specified amount of vitamin, and they test for toxins in lots of things, including dried seaweed snacks (!). The intro to ConsumerLab's review of KN95 masks [2] says: > We reviewed many KN95 masks sold on Amazon but found only one currently on the FDA's list of authorized respirators that we recommend, and we found two that should be avoided. We also found an FDA-authorized KN95 through an online direct distributor in the U.S. (EDIT: details are available to subscribers, but the U.S. distributor they recommend is https://bonafidemasks.com https://bonafidemasks.com, which was also recommended in a sibling a comment on this page by codemac.) [1] https://en.wikipedia.org/wiki/ConsumerLab.com https://en.wikipedia.org/wiki/ConsumerLab.com [2] https://www.consumerlab.com/answers/how-to-make-covid-19-mask-at-home-as-effective-as-n95/make-a-mask/#kn95 https://www.consumerlab.com/answers/how-to-make-covid-19-mas...