Ashwagandha Benefits and Side Effects: Stress, Sleep and Liver Risks
Ashwagandha may ease stress and improve sleep a little. In 12 trials with 1,002 adults, ashwagandha extracts lowered stress and anxiety scores more than placebo, mostly at 300 to 600 mg a day, but the evidence is low in certainty. Side effects are usually mild, though rare cases of liver injury have been reported. Avoid it if pregnant or if you have thyroid disease.