The best way to take ashwagandha is as a standardized root extract, in the range of 300 to 600 mg per day, taken consistently for several weeks. That dosage range, standardized to 5% withanolides (the plant’s active compounds), is the one provisionally recommended for anxiety by an international taskforce of the World Federation of Societies of Biological Psychiatry and the Canadian Network for Mood and Anxiety Treatments. But the details matter: when you take it, what form you choose, and how long you stick with it all influence what you get out of it.
How Much to Take
Clinical trials have used anywhere from 240 to 1,250 mg per day of ashwagandha extract, so there’s a wide effective window. The 300 to 600 mg range for a root extract standardized to 5% withanolides is the most well-supported dose for stress and anxiety relief. If you’re using whole root powder instead of a concentrated extract, you’d need significantly more: roughly 6,000 mg of root powder to match what studies use, since extracts concentrate the active compounds.
The key number to look for on any label is the withanolide percentage. Most products standardize to somewhere between 2.5% and 5% withanolides. A pharmacokinetic study published in Heliyon found that higher withanolide content meaningfully improves how well your body absorbs and uses the supplement. An extract with 35% withanolide glycosides stayed in the bloodstream longer and had better overall bioavailability than one standardized to just 2.5%. You don’t need to seek out ultra-concentrated formulas, but choosing a product that clearly states its withanolide content (and isn’t vague about it) is a good sign of quality.
Morning or Evening
Timing depends on why you’re taking it. If your goal is better sleep, take ashwagandha before bed. If you find it gives you a subtle energy boost or mental clarity, morning works better. Some people split their dose, taking half in the morning and half at night, which is a reasonable approach if you’re using it for general stress management throughout the day. There’s no strict rule here, and individual responses vary enough that it’s worth experimenting for a week or two to see what feels right.
Capsules, Powder, or Liquid
Capsules and tablets are the most convenient and widely studied form. Powder absorbs slightly faster because it dissolves into liquid readily, while a tablet or capsule needs to break down first. That said, the difference in absorption speed is modest, and many modern capsule formulations include ingredients designed to enhance bioavailability.
The real advantage of capsules is consistency. Each one delivers a measured dose, so you know exactly how much you’re getting. With loose powder, you’re estimating unless you weigh it. Powder does have one practical perk: you can mix it into food or drinks, which matters if you dislike swallowing pills.
In Ayurvedic tradition, ashwagandha powder is mixed with warm milk, ghee, or honey. The fat in milk or ghee may help with absorption of the plant’s fat-soluble compounds, which gives some scientific logic to the centuries-old practice. If you enjoy the ritual and the taste doesn’t bother you (it’s earthy and bitter), this is a perfectly valid way to take it.
How Long Before It Works
Ashwagandha is not a fast-acting supplement. Most people need at least two to four weeks of daily use before noticing meaningful changes in stress levels, sleep quality, or energy. Some benefits, particularly around physical performance and hormonal shifts, can take six to eight weeks or longer to develop. The key word is “daily.” Sporadic use won’t build the same effects as consistent supplementation.
If you’ve been taking it for six weeks at an appropriate dose and notice nothing, it may simply not be effective for you, or the product you’re using may have low withanolide content despite what the label claims. Third-party testing certifications (like NSF or USP verification) can help you avoid underdosed or contaminated products.
How Long to Keep Taking It
Most clinical trials run 8 to 12 weeks, and there are no firm guidelines on maximum duration. Some practitioners suggest cycling: taking it for two or three months, then pausing for two to four weeks before starting again. This isn’t based on strong clinical evidence, but rather a precautionary approach given the limited long-term data.
A 2025 case review in the journal Cureus looked specifically at whether stopping ashwagandha causes withdrawal symptoms and found no documented cases of addiction or withdrawal in the literature. However, the authors noted that people taking high doses for extended periods should taper off gradually rather than stopping abruptly, just as a reasonable precaution. If you’ve been using it at standard doses for a few months, stopping without tapering is unlikely to cause problems.
Who Should Avoid It
According to the NIH’s National Center for Complementary and Integrative Health, ashwagandha should be avoided during pregnancy and breastfeeding. It’s also not recommended for people with autoimmune conditions or thyroid disorders, since it can stimulate immune activity and alter thyroid hormone levels.
Ashwagandha can interact with several types of medications:
- Thyroid medications: it may raise thyroid hormone levels on its own, compounding the effect
- Diabetes medications: it can lower blood sugar, risking an additive drop
- Blood pressure medications: it may further reduce blood pressure
- Sedatives: it has calming properties that could amplify drowsiness
- Immunosuppressants: it may counteract drugs designed to suppress the immune system
Because ashwagandha may increase testosterone levels, people with hormone-sensitive prostate cancer should not take it. If you’re on any of the medications listed above or scheduled for surgery, it’s worth discussing with a pharmacist or physician before starting.
Putting It Together
For most people, the straightforward approach works: pick a capsule standardized to at least 5% withanolides, take 300 to 600 mg daily, choose morning or evening based on your goal, and give it a solid month before judging results. Take it with food if it bothers your stomach. If you prefer the traditional route, stirring the powder into warm milk with a little honey is a time-tested method that also provides some fat to aid absorption. Consistency matters more than any single detail of timing or form.