Ashwagandha
An Ayurvedic herb (Withania somnifera) used in supplements; standardized root extracts are marketed for stress, sleep, and performance.
Should I eat Ashwagandha?
Ashwagandha root extract can modestly help with stress and sleep, but quality varies and safety beyond short‑term use is uncertain. Choose standardized root products from reputable brands and avoid use if you have liver, thyroid, pregnancy, or medication concerns without medical guidance.
Summary
This herb is a processed botanical extract, not a nutrient, and the best evidence supports small, short‑term benefits for stress and sleep at about 300–600 mg/day. Short‑term tolerability is generally good, yet rare liver injury and thyroid effects have been reported, so pay attention to symptoms and drug interactions. Regulatory authorities treat it as a supplement rather than an approved food ingredient, and safe intake limits for general food use are not set. Because extraction methods and standardization differ, select products that declare withanolide content and avoid exceeding labeled directions.
Key Research Benefits
Modest stress reduction (short‑term)
Standardized root extracts at about 300–600 mg/day for 4–12 weeks can modestly lower perceived stress and anxiety in adults.
Small improvements in sleep
Recent evidence summarizing randomized trials reports better sleep quality, shorter time to fall asleep, and improved sleep efficiency versus placebo.
Possible support for exercise recovery
Some studies show small gains in strength or reduced fatigue when combined with training, but effects depend on the extract and dose and remain inconsistent.
Key Research Risks
Liver injury (rare)
Case reports suggest occasional liver injury, more often with higher doses or prolonged use; stop immediately if jaundice or dark urine appears and seek medical care.
Thyroid effects
Ashwagandha can increase thyroid hormones in some people and may aggravate hyperthyroidism or interact with thyroid medications.
Pregnancy, breastfeeding, and hormone‑sensitive conditions
Avoid use during pregnancy/breastfeeding and in men with hormone‑sensitive prostate cancer unless medically supervised.
Processing and product variability
Extracts are produced with water/alcohol (including methanol) and spray‑dried, then standardized to withanolides; weak quality control can lead to variable potency or residual solvents—choose reputable, standardized root extracts.
Overview
What is it?
Why is it used?
Origin
Native to India and used in Ayurveda for centuries as a 'rasayana' (rejuvenative). The Sanskrit name 'ashwagandha' refers to the root's horse-like smell. Today, most commercial extracts come from cultivated roots in India and are standardized to withanolides for global dietary supplement markets.
Process: Hydroalcoholic extraction, filter, concentrate, spray-dry, standardize
Steps
Chemicals
Research & Safety
Potential Concerns
The biggest safety signals are rare liver injury and possible changes in thyroid hormones. Short‑term use (up to about 3 months) is generally tolerated, but high doses or prolonged use may raise risks, so stick to labeled directions and monitor how you feel. Interaction with medicines—especially thyroid drugs, sedatives, immunosuppressants, and diabetes medications—is possible; check with your clinician before combining. In the U.S. it is not GRAS as a food additive, and safe intake limits for general food use have not been established.
Potential Benefits
No demonstrated nutrimental benefit
Digestive Effects
At typical supplement doses, some people report nausea, loose stools, stomach upset, or drowsiness. Digestive side effects seem more common at higher daily amounts (above roughly 600–1,000 mg of extract) or when multiple calming ingredients are combined. People with IBS or reflux may be more sensitive and may prefer starting at the low end of the dose range. If digestive issues persist or worsen, stop use and discuss with a clinician.
Limit Consumption
Avoid ashwagandha during pregnancy and breastfeeding due to insufficient safety data. People with liver disease or who drink alcohol regularly should be cautious because of rare reports of liver injury. Those with thyroid disorders, on thyroid medication, sedatives, immunosuppressants, or diabetes medicines should consult a clinician and monitor for symptoms of over‑ or under‑treatment. Men with hormone‑sensitive prostate cancer should avoid use unless a clinician advises otherwise. It is not appropriate for infants, and no dosing is established for children.
Fact Sheet
Regulatory Status
ESG & Sustainability
Allergens and Diet
Natural Alternatives
Chamomile
Lavender
L-theanine
Citations
Ashwagandha: Health Professional Fact Sheet
2025-05-02NIH Office of Dietary Supplements • NIH ODS
Withania somnifera whole-plant extract preparation and characterization
2022-06-27Balkrishna A., et al. • Scientific Reports (Nature)
Ashwagandha Root Dry Extract (monograph excerpt)
2024-01-01U.S. Pharmacopeia • USP–NF
Ashwagandha: mechanisms, health benefits, and role in sports
2025-07-10Sprengel M., et al. • Nutrition & Metabolism
Ashwagandha—Usefulness & Safety
2024-12-01National Center for Complementary and Integrative Health • NCCIH
Warning Letter (Orphic Nutrition) referencing ashwagandha claims
2021-04-27U.S. Food and Drug Administration • FDA
Ashwagandha—Call for evidence for risk assessment
2024-07-08FSA • UK Food Standards Agency
Recent Advancements in Extraction Techniques of Withania somnifera
2023-08-24Shinde S., et al. • ACS Omega
Ashwagandha is Popular… But Could Harm the Liver?
2025-05-12T. Shaw • CU Anschutz Dept. of Medicine News
Extraction of Bioactive Compounds From Withania somnifera
2025-03-15Singirala S.K., et al. • PMC