When to take Ashwagandha

Also known as Withania somnifera, Indian ginseng

Any time; consistency matters more than timing. Studies have not compared morning and night, and the sleep and stress benefits seen in trials came from taking it daily for several weeks.

Last reviewed October 13, 2026

Timing

Best time	Any time of day
Food	With or without food
Fat-soluble	No

Any time; consistency matters more than timing.
No study has tested morning versus night dosing.
In the sleep trials, people took the capsule with milk or water.
Sleep benefits were larger in trials that lasted 8 weeks or longer.
Some people feel drowsy on ashwagandha.

Check with your doctor first if…

Pregnancy or breastfeeding: avoid it during pregnancy and do not use it while breastfeeding.
Thyroid or autoimmune conditions: it is not recommended for people with thyroid or autoimmune disorders.
Medicines: it may interact with thyroid hormone, diabetes and blood pressure medicines, immune-suppressing drugs, sedatives and seizure medicines. Ask your doctor first.
Surgery: it is not recommended before surgery.
Hormone-sensitive prostate cancer: avoid it, because it may raise testosterone.
Liver: rare cases of liver injury have been linked to ashwagandha supplements.
Side effects: some people get drowsiness, stomach upset, diarrhea or vomiting.
How long to use: it may be safe for up to 3 months. Long-term safety is not known.

Amounts studied

120–600 mg/day of root or root/leaf extract for 6–12 weeks in sleep trials; stress benefits were seen at 300–600 mg/day.

Follow the serving size on your product’s label.

What the research says

Area	Evidence	Summary
Stress	Moderate	A review of 12 trials with about 1,000 adults found lower stress scores than placebo, with benefits at 300–600 mg a day. The authors rated the certainty as low because the studies varied a lot.^[2]
Sleep quality	Moderate	A review of 5 trials with 400 adults found a small but real improvement in sleep. Results were larger at 600 mg a day or more and after 8 weeks or longer.^[3]
Normal testosterone levels	Limited	Ashwagandha has been studied for supporting normal testosterone levels. NCCIH calls the evidence in men limited; it comes from trials that lasted 2 to 4 months.^[1]

Questions

Should I take ashwagandha at night?

You can, but no study has compared night with morning. What mattered in trials was taking it every day for weeks. It can make some people drowsy, so see how it affects you.

How long does ashwagandha take to work?

Trials ran for 6 to 12 weeks. In the sleep review, results were stronger after 8 weeks or more. Studies of testosterone lasted 2 to 4 months.

Can I take ashwagandha every day?

Trials gave it daily. It may be safe for up to 3 months, but long-term safety has not been studied well. Rare cases of liver injury have been linked to it, so tell your doctor you take it.

Can I take ashwagandha with thyroid medicine?

Ask your doctor first. Ashwagandha may interact with thyroid hormone medicine, and it is not recommended for people with thyroid disorders.

Plan your whole routine

Add Ashwagandha and everything else you take to the planner to see your morning, midday and evening, and what to keep apart.

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From AT2A

Sources

Ashwagandha: Usefulness and Safety, NIH NCCIH (accessed October 13, 2026)
Does Ashwagandha supplementation have a beneficial effect on the management of anxiety and stress? A systematic review and meta-analysis of randomized controlled trials (Phytotherapy Research, 2022), PubMed (NIH NLM) (accessed October 13, 2026)
Effect of Ashwagandha (Withania somnifera) extract on sleep: A systematic review and meta-analysis (PLoS One, 2021), NIH NLM PubMed Central (accessed October 13, 2026)

These statements have not been evaluated by the Food and Drug Administration. This information is not intended to diagnose, treat, cure, or prevent any disease. It is general information, not medical advice: talk with your doctor or pharmacist before starting a supplement, especially if you are pregnant, breastfeeding, take medicine or have a health condition.