Most people take ashwagandha once or twice daily, every day, for a minimum of several weeks before noticing benefits. The typical dose in clinical studies ranges from 300 to 600 mg per day of a root extract, though some formulations call for lower or higher amounts depending on concentration. Getting the frequency and duration right matters more than most people realize, because ashwagandha builds its effects over time rather than working like a single-dose supplement.
Daily Use Is the Standard Approach
Ashwagandha is taken daily, not on an as-needed basis. Unlike something like caffeine, which you feel within the hour, ashwagandha works by gradually influencing your body’s stress response. Clinical trials consistently use daily dosing, and participants typically start noticing reduced anxiety and better sleep within 4 to 12 weeks. Researchers at Ohio State University’s Wexner Medical Center recommend committing to at least three months of daily use before deciding whether it’s working for you.
Most supplements come in capsules designed to be taken once or twice a day. If the label says 600 mg daily, that might be split into two 300 mg capsules, one in the morning and one in the evening. Either approach is fine. Studies haven’t established that splitting the dose is better than taking it all at once, so follow whatever the specific product recommends.
How Much Per Day Depends on the Extract
Not all ashwagandha supplements contain the same concentration of active compounds (called withanolides), so the milligram number on the label can be misleading without context. Here’s what the research supports for common forms:
- Root extract (standardized to 5% withanolides): 300 to 600 mg per day. This is the range provisionally recommended for anxiety by an international task force from the World Federation of Societies of Biological Psychiatry.
- KSM-66 extract: 250 to 600 mg per day. This is a widely studied root-only extract.
- Sensoril extract: 125 to 500 mg per day. Sensoril uses both root and leaf, resulting in a higher withanolide concentration per milligram, which is why the effective dose is lower.
- Raw root powder: Up to 6,000 mg per day. Powders are far less concentrated than extracts, so you need much more to get the same effect.
If you’re trying ashwagandha for the first time, starting at the lower end of the range for your extract type (around 200 to 300 mg for a concentrated extract) and increasing gradually over a week or two is a reasonable approach. In one clinical trial, participants taking 500 mg of root extract daily showed significantly lower stress and anxiety scores after 60 days. Another study found that 300 mg daily was enough to measurably reduce cortisol, the body’s primary stress hormone.
When to Take It: Morning vs. Evening
There’s no single “best” time of day that’s been proven superior in clinical trials. The choice depends on what you’re hoping to get from it. If you’re using ashwagandha primarily for daytime stress and focus, taking it with breakfast keeps a consistent routine. If sleep quality is your main goal, taking it in the evening makes more intuitive sense, and many people report it helps them wind down.
Taking ashwagandha with food can reduce the chance of stomach discomfort, which is the most commonly reported side effect. Some products include black pepper extract (piperine) to improve absorption, so check your label before adding extra on your own.
How Long You Can Take It Continuously
This is where the evidence gets thinner. Most clinical trials have studied ashwagandha for 8 to 12 weeks, and the supplement appears safe and well-tolerated within that window at doses of 300 to 600 mg daily. One study followed participants for a full 12 months without observing harmful effects, including no liver problems. But that study stands largely alone, and there isn’t enough long-term data to say with certainty that years of uninterrupted use carries no risk.
Because of this gap, many practitioners suggest limiting continuous use to about three months, then taking a break before resuming. This cycling approach (sometimes described as “8 weeks on, 2 to 4 weeks off”) isn’t based on strong clinical evidence showing it’s necessary. It’s a precautionary measure given the limited long-term data. If you’ve been taking ashwagandha daily for several months and feel it’s helping, a short break can also help you gauge whether the benefits are real or whether you’ve simply adjusted to how you feel.
Liver Safety at Normal Doses
You may have seen headlines about ashwagandha and liver damage. A large meta-analysis published in Frontiers in Nutrition in 2025 put this into perspective: researchers identified only nine publications reporting potential liver toxicity, and many of those cases involved people with pre-existing liver conditions, unusually high doses, or simultaneous use of other supplements. When researchers analyzed the chemical profile of ashwagandha root specifically, 96% of the compounds were predicted to be safe for the liver, with very low toxicity scores. Clinical monitoring studies have observed only mild, reversible increases in liver enzymes in a small number of participants, and those levels returned to normal after stopping the supplement. At recommended doses, the risk to your liver is minimal.
Who Should Avoid Daily Use
Ashwagandha isn’t appropriate for everyone, regardless of dose or frequency. You should avoid it entirely if you are pregnant or breastfeeding, have an autoimmune disease (such as lupus or rheumatoid arthritis), or have a thyroid disorder. People with hormone-sensitive prostate cancer should also skip it, since ashwagandha can raise testosterone levels.
It can also interact with several types of medications: drugs for diabetes and high blood pressure, immunosuppressants, sedatives, anti-seizure medications, and thyroid hormone replacements. If you’re scheduled for surgery, stop taking it beforehand, as it may affect sedation and blood pressure during the procedure.
A Practical Starting Plan
If you’re new to ashwagandha, a straightforward approach looks like this: pick a reputable extract (KSM-66 and Sensoril are the most studied), start at 200 to 300 mg once daily with food, and take it at the same time each day. After a week or two with no stomach issues, you can increase to the full recommended dose on the product label, typically 300 to 600 mg. Give it at least 4 weeks of consistent daily use before evaluating whether you notice a difference in stress levels or sleep quality, and plan on a full 8 to 12 weeks for the best assessment. After three months, consider taking a few weeks off before starting another cycle.