Earlier quoted context omitted.
I stick to stores that I can trust. Costco very much can. Walmart maybe. Amazon nope who knows what your actually getting.
I would focus on finding brands to trust vs stores. Stores do absolutely zero diligence on ingredients of supplements. https://www.foodsafetynews.com/2015/02/major-retailers-order... > Three to four samples of each supplement purchased in different parts of the state were tested. Each sample was tested five times, for a total of 390 tests on 78 samples. Schneiderman said that only 4 percent of Walmart’s supplements (…
and brands are bought out by private equity and change for the worse all the time. look at the downfall of many historically great brands/names that are no longer what they once where: pyrex vs PYREX. Craftsmen. MEC. Birkenstock. And so many more.
Costco may one day fall too but their brand is what they sell in store and they do actually seem to do due diligence (also they have the Kirkland brand)