Ashwagandha offers women a range of benefits centered on stress reduction, hormonal balance, better sleep, and improved sexual health. In clinical trials, women taking ashwagandha saw a 25% reduction in cortisol, the body’s primary stress hormone, compared to virtually no change with a placebo. Those effects on stress ripple outward into sleep, mood, menopause symptoms, and more.
Stress and Cortisol Reduction
Chronic stress does more than make you feel frazzled. Elevated cortisol over time can disrupt your menstrual cycle, trigger weight gain around the midsection, and interfere with sleep. In a randomized, double-blind trial published in Medicine, women in the ashwagandha group experienced a statistically significant 25% drop in serum cortisol, while women taking the placebo saw only a 0.6% decrease. That gap is striking and helps explain why so many of ashwagandha’s other benefits, from better sleep to hormonal balance, seem to flow from its ability to dial down the stress response.
Most stress-related trials used root extract doses between 300 and 600 mg per day, taken for 30 to 90 days. An international task force from the World Federation of Societies of Biological Psychiatry and the Canadian Network for Mood and Anxiety Treatments has provisionally recommended 300 to 600 mg of ashwagandha root extract daily for generalized anxiety disorder, giving some clinical weight to those dosage ranges.
Hormonal Balance and PCOS
For women with polycystic ovary syndrome (PCOS), ashwagandha may help address several of the condition’s hormonal drivers at once. It has been shown to reduce levels of testosterone, luteinizing hormone (LH), and follicle-stimulating hormone (FSH), three hormones that are often elevated in PCOS and contribute to symptoms like acne, excess hair growth, and irregular periods. It also appears to increase insulin sensitivity, which matters because insulin resistance is a core feature of PCOS for many women and fuels further hormonal disruption.
Menopause and Perimenopause Symptoms
A randomized, double-blind trial of 100 perimenopausal women found that ashwagandha root extract significantly reduced symptoms across three categories: psychological (mood changes, anxiety, irritability), physical (hot flashes, sleep disruption, fatigue), and urogenital (vaginal dryness, bladder issues, sexual discomfort). All three domains improved significantly compared to placebo.
The hormonal shifts behind those improvements are worth noting. Women taking ashwagandha had a significant increase in estradiol, the primary form of estrogen, along with meaningful decreases in FSH and LH. Declining estradiol is the central hormonal change of menopause, and even a modest boost can ease vasomotor symptoms like hot flashes and night sweats. Testosterone levels did not change significantly, suggesting the effect is targeted rather than broadly hormonal.
Sexual Health and Desire
Ashwagandha has shown clear benefits for sexual function in healthy women. In a prospective, randomized trial, women taking ashwagandha root extract reported significantly greater improvements in desire, arousal, lubrication, and satisfaction compared to women on a placebo. Improvements in arousal were significant by week 8, and lubrication improved as early as week 4. These gains were measured using the Female Sexual Function Index, a validated questionnaire that captures multiple dimensions of sexual experience.
Low libido in women is often tied to stress, fatigue, and hormonal fluctuations rather than a single cause. Ashwagandha’s combination of cortisol reduction, hormonal support, and better sleep quality likely contributes to these sexual health improvements from multiple angles.
Sleep Quality
Several trials have tested ashwagandha specifically for sleep, with encouraging results. In one study, 150 adults with self-reported insomnia and poor sleep took an ashwagandha root and leaf extract or a placebo for six weeks. Benefits appeared to be greater at doses of 500 to 600 mg per day compared to lower doses. A separate trial in female athletes found that 600 mg of ashwagandha root extract per day significantly improved perceived sleep quality within 14 days, which is faster than many other natural sleep interventions tend to show results.
Athletic Recovery and Strength
Research on ashwagandha and physical performance in women is still limited, but one study in female footballers provides useful data. Players taking 600 mg of ashwagandha root extract daily for 28 days showed significantly better recovery scores compared to the placebo group, with the difference becoming clear by day 28. They also reported improved sleep quality by day 14, which itself supports faster recovery between training sessions. The study did not find large independent effects on raw strength measures like grip strength or jump height, suggesting ashwagandha’s athletic benefit for women is more about recovering well than getting dramatically stronger.
Thyroid Function
Ashwagandha can meaningfully influence thyroid hormone levels. In a double-blind trial of patients with subclinical hypothyroidism (mildly underactive thyroid that hasn’t yet caused obvious symptoms), ashwagandha normalized serum thyroid hormones, improving TSH, T3, and T4 levels significantly compared to placebo. This is relevant for women because hypothyroidism is far more common in women than men.
However, this thyroid-stimulating effect is a double-edged sword. If your thyroid function is normal or you take thyroid medication, ashwagandha could push hormone levels too high. There are case reports of ashwagandha triggering thyroiditis, an inflammatory thyroid condition. If you have any thyroid condition, whether underactive or overactive, this is worth discussing with your provider before starting supplementation.
Typical Dosages in Clinical Trials
Across clinical trials, ashwagandha doses have ranged from 240 mg to 1,250 mg per day of concentrated root extract. Most positive results have come from doses between 300 and 600 mg daily. The active compounds in ashwagandha are called withanolides, and supplements are typically standardized to a specific percentage of them. You’ll see labels listing 1.5% to 5% withanolides depending on the extract.
Common branded extracts used in research include KSM-66 (a root-only extract), Shoden (standardized to a higher withanolide concentration), and Sensoril (made from both root and leaf). These are not interchangeable since they contain different concentrations of active compounds, so the effective dose in milligrams varies by brand. Effects in most studies emerged within 4 to 8 weeks of consistent daily use.
Safety Considerations for Women
Ashwagandha should be avoided during pregnancy and breastfeeding. The National Center for Complementary and Integrative Health states this clearly, and there is not enough safety data to override that caution.
Women with autoimmune conditions like lupus, rheumatoid arthritis, or Hashimoto’s thyroiditis should be cautious. Ashwagandha actively modulates the immune system: it increases T-cell activity, enhances immune cell function, and alters inflammatory signaling molecules. For someone whose immune system is already overactive and attacking healthy tissue, stimulating it further could worsen symptoms or trigger flares. While some research has explored ashwagandha’s ability to reduce specific inflammatory markers associated with arthritis, the broader immune-stimulating effects make it unpredictable in autoimmune disease.
The most commonly reported side effects in clinical trials are mild: drowsiness, stomach upset, and loose stools, particularly at higher doses. Liver injury has been reported in rare cases, typically with prolonged use or high doses.