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Ashwagandha
Also called: withania, KSM-66, indian ginseng
A herb (Withania somnifera) long used in Ayurveda; the root is sold as powder or extract.
- Why people take it
- Stress, anxiety, sleep and energy.
- What the evidence says
- Small, short studies suggest it may lower stress and improve sleep a little. Long-term effects are not known.
- Be careful
- Rare cases of liver injury have been reported. Avoid in pregnancy and breastfeeding. Can raise thyroid hormone levels and may add to the effect of sedatives. Not for people with autoimmune disease or before surgery without asking a doctor.
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Common questions
What is Ashwagandha?
A herb (Withania somnifera) long used in Ayurveda; the root is sold as powder or extract.
Why do people take Ashwagandha?
Stress, anxiety, sleep and energy.
Does Ashwagandha work?
Small, short studies suggest it may lower stress and improve sleep a little. Long-term effects are not known.
Is Ashwagandha safe?
Rare cases of liver injury have been reported. Avoid in pregnancy and breastfeeding. Can raise thyroid hormone levels and may add to the effect of sedatives. Not for people with autoimmune disease or before surgery without asking a doctor.
Sources and further reading
Last reviewed 31 October 2026. Written by Satya Babu.
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