KSM-66 Ashwagandha Root Extract 600 mg

Nutricost's KSM-66 capsule is one of the simplest and cheapest ways to take the most widely used branded ashwagandha extract. Each capsule contains 600 mg of organic KSM-66 root extract standardized to at least 5% withanolides, with withaferin A kept under 0.1%, plus 5 mg of BioPerine black pepper extract. One capsule is the full daily serving.

That dose lines up well with the research. A 2021 meta-analysis of five randomized trials found a small but significant benefit of ashwagandha extract on overall sleep, with larger effects at 600 mg a day or more, over at least eight weeks, and in people with insomnia. The NIH Office of Dietary Supplements summarizes the evidence as suggesting ashwagandha may lower stress, anxiety and cortisol, while noting that studies are small and used varied preparations. Expect gradual change over several weeks, not a sedative effect on night one.

Safety deserves more attention than ashwagandha marketing usually gives it. The herb appears well tolerated for up to about three months, but there are reports of liver injury, it may affect thyroid function and interact with some medications, and some experts advise against it during pregnancy. Anyone with a thyroid or liver condition, or who takes prescription medication, should check with a clinician first.

buyers describe it as easy to take with no aftertaste and often credit it with calmer days and better sleep, though a meaningful share say it did nothing for them and some mention headaches. At roughly $0.25 to $0.28 per capsule it is excellent value. Nutricost says it is made in an FDA-registered, GMP-compliant facility and tested by an independent accredited lab, but it carries no named certification such as NSF or Informed Choice.