The Price Catalog
Direct Amazon prices for every supplement in the reference — compared on cost per dose and cost per active ingredient.
How we picked. We curate three brands we trust and use: Thorne, Pure Encapsulations, and Life Extension. Where they all carry a product, you'll see all three compared side-by-side — cheapest per dose and cheapest per mg are tagged Best. Where none of them carry a product, we name the alternative we'd actually buy — based on clinical-trial form, manufacturer reputation, and independent reviews.
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Prices fluctuate. Snapshot captured for editorial reference — verify on Amazon before purchase. Some dose-per-serving figures are extrapolated from typical brand formulations (marked in notes); for high-stakes use, verify on the product label. None of these links are affiliate links — Whatstack receives no commission from purchases.