Ashwagandha for stress: what dose was studied
Ashwagandha has a real stress trial, and it used a standardized extract, not an unspecified root powder. Match the extract if you are trying to match the study. Do not stack it on thyroid medicine, sedatives, or pregnancy without advice. A lower score on a stress questionnaire is not a treatment for an anxiety disorder.
The searchable claim is that ashwagandha "lowers cortisol." The careful version is smaller. A randomized trial of a standardized Withania somnifera extract reported stress-relieving effects compared with placebo (PMID 31517876). The product in that paper is the product the result belongs to.
Why the bottle matters
Withanolide content varies. A capsule that only says "ashwagandha root" does not tell you it matches the extract in the trial. KSM-66 and Shoden are different extracts with different papers. Read the methods of the paper you are relying on before you copy a milligram number from a label.
Who should not treat this as a casual add-on
Thyroid disease, thyroid hormone, sedating drugs, and pregnancy are the situations where this root stops being a simple stress supplement. Stop and ask if you develop liver symptoms. The trial record is not a personality transplant and it is not a replacement for sleep, therapy, or prescribed care.
Sources
- Lopresti AL, et al. An investigation into the stress-relieving and pharmacological actions of an ashwagandha (Withania somnifera) extract. Medicine (Baltimore). 2019. PMID: 31517876.