Most women do well with 300 to 600 mg of ashwagandha root extract per day. That range covers the doses used in the majority of clinical trials involving women, whether the goal is stress relief, better sleep, or managing menopause symptoms. The exact amount that works best depends on what you’re taking it for and how concentrated your supplement is.
The Standard Dose Range
Clinical trials have used ashwagandha doses anywhere from 120 mg to 12,000 mg per day, but the most common and well-supported range is 150 to 600 mg daily of a standardized root extract. Many studies split this into two doses, typically 300 mg in the morning and 300 mg in the evening. That twice-daily pattern of 300 mg is the most frequently tested regimen and is considered both effective and safe.
One thing that makes dosing confusing is that not all ashwagandha supplements are created equal. The active compounds, called withanolides, can make up anywhere from 1.5% to 35% of the extract depending on the brand and extraction method. A high-potency extract standardized to 35% withanolides (like Shoden) can produce meaningful effects at just 120 to 240 mg per day. A lower-concentration extract standardized to around 5% withanolides needs a higher milligram dose to deliver the same amount of active compounds. Always check the withanolide percentage on the label, not just the total milligrams.
Doses by Goal
Stress and Cortisol
For reducing perceived stress, 300 mg per day has been shown to lower cortisol levels and support weight management in people experiencing chronic stress. A higher dose of 500 mg per day produced significant improvements on standardized stress and anxiety scales, along with a measurable drop in morning cortisol. If stress relief is your primary reason for taking ashwagandha, 300 to 500 mg daily is the sweet spot supported by research.
One nuance worth knowing: a study using 240 mg per day of a high-potency extract found that it reduced stress and fatigue scores but only increased testosterone in men, not women. So the hormonal response can differ by sex even when the stress-relief benefits are similar.
Menopause Symptoms
A randomized, placebo-controlled trial gave women 300 mg of ashwagandha root extract twice daily (600 mg total) for eight weeks. The women taking ashwagandha experienced a significant reduction in hot flashes and urinary symptoms, along with improvements in menopause-related quality of life scores. If you’re using ashwagandha specifically for perimenopause or menopause, 600 mg per day split into two doses is the dose with the strongest evidence behind it.
That same dosing protocol, 300 mg twice daily, also led to increases in estrogen levels and improvements in sexual function in women ages 18 to 64, along with decreases in follicle-stimulating hormone and luteinizing hormone.
Sleep
For sleep quality, lower doses can be effective when using a concentrated extract. A study using 120 mg of an extract standardized to 35% withanolides found a 42% increase in restorative sleep over six weeks. If your supplement has a lower withanolide concentration, a dose in the 300 to 600 mg range taken in the evening is a reasonable approach. Some people mix ashwagandha powder into warm milk before bed as a sleep ritual.
How Extract Type Changes Your Dose
Three branded extracts dominate the market, and each requires a different dose because of its withanolide concentration:
- KSM-66: Standardized to about 5% withanolides. Typical dose is 300 to 600 mg per day.
- Sensoril: Standardized to 10% withanolides. Effective doses start at 125 mg for general adaptogenic effects and go up to 500 mg.
- Shoden: Standardized to 35% withanolides. Studies have used doses as low as 60 to 240 mg per day.
If your supplement doesn’t list a branded extract, look for the withanolide percentage. A generic extract with 5% withanolides at 600 mg delivers roughly 30 mg of active withanolides. A Shoden extract at 120 mg delivers about 42 mg. The milligram number on the front of the bottle is only part of the picture.
Thyroid Effects to Watch For
Ashwagandha actively stimulates thyroid hormone production. In a study of people with mildly underactive thyroids, 300 mg twice daily for eight weeks increased the main thyroid hormones by 19.6% and 41.5% respectively, while thyroid-stimulating hormone dropped by 17.4%. For women with subclinical hypothyroidism, this could be genuinely helpful.
But this same property makes ashwagandha risky if you have an overactive thyroid or are taking thyroid medication. Boosting thyroid hormones when they’re already elevated can worsen symptoms like anxiety, heart palpitations, and restlessness. One reported case of thyrotoxicosis involved a patient taking 1,950 mg per day for about two months. If you have any thyroid condition, this is a supplement to discuss with your provider before starting.
Upper Limits and Side Effects
There is no formally established maximum dose, but research suggests that going above 600 mg per day hasn’t been shown to produce meaningfully greater benefits. The most common side effects are mild: drowsiness and stomach discomfort. Rare case reports have linked ashwagandha to liver toxicity, though these cases typically involved high doses or pre-existing conditions.
Taking it with food reduces the chance of stomach upset. You can take it morning or evening, whichever fits your routine better. If you’re using it for sleep, evening makes sense. If it’s part of a broader supplement stack, morning with breakfast works fine. Consistency matters more than timing.
Pregnancy and Breastfeeding
There is no reliable safety data on ashwagandha during pregnancy or breastfeeding. The research simply hasn’t been done, and because herbal supplements aren’t standardized the way pharmaceuticals are, the concentration of active ingredients can vary widely between products. Most health authorities recommend avoiding ashwagandha if you’re pregnant, trying to conceive, or nursing.