Stackwise, a supplement interaction checker

Why it surfaced

Stackwise does more than list ingredients: it flags mechanisms such as blocked absorption, additive bleeding risk, serotonin overload, and combinations that need to be spaced apart. Its public index contains 110 documented interactions, making this a notably concrete health tool rather than a vague wellness landing page.

A free, no-signup checker that maps interactions among 53 supplements and 20 prescription medication classes.