This **KSM-66 Ashwagandha** delivers a full 600mg per 2-capsule serving for stress and cortisol support, landing right at the top of the 300–600mg range used in clinical trials. KSM-66 is the specific branded root extract behind many of those stress studies, standardized to more than 5% withanolides — the compounds that drive its calming effect. Follow the label's 2-capsule daily direction and you're getting the complete studied dose.

Take just one capsule and you drop to 300mg, the bottom of the effective range, so you'd feel a partial effect at best. The full serving is where the cortisol and perceived-stress benefits show up most consistently, and there's growing evidence it helps sleep quality too — especially when stress is what's keeping you up.

One thing to know: ashwagandha isn't recommended during pregnancy, so skip it if that applies to you.