Herbs & botanicals
Ashwagandha
Names you may see: Withania somnifera Indian ginseng KSM-66
The quick take
Ashwagandha is a botanical used in Ayurvedic traditions. Some preparations have evidence for stress and sleep support.
A closer look
What forms will I see on a label?
Root powder, root extracts and root-and-leaf extracts differ. KSM-66 is one branded root extract; an extract equivalent is not the same as its actual extract weight.
Why people use it
People look to ashwagandha for stress management and sleep support. Sports supplements also market it for training performance and recovery.
These are common goals and marketing uses. The evidence section below explains what research supports.
NIH National Center for Complementary and Integrative Health — common uses context ↗
What does the evidence tell us?
Studies use particular extracts and often run for short periods. Results from one preparation should not be assumed to apply to every ashwagandha product.
What should I know before using it?
Avoid during pregnancy. Thyroid conditions, autoimmune conditions and sedating medicines warrant professional advice. Rare liver injury has been reported.
Sources & further reading
NIH National Center for Complementary and Integrative Health ↗
Content reviewed: September 30, 2026
General educational information. Follow the product label and seek individual advice when needed.