Ashwagandha and female hormones: what studies show and what remains open

Ashwagandha may ease stress and certain menopausal symptoms in some women. Small clinical trials offer early hints of this. That does not add up to a general “hormone balance,” though: for reliable improvements in ovulation, fertility or PCOS, there are not enough solid results that address those questions directly. The open questions are interesting, but they have to be kept separate from proven treatment effects. Ashwagandha should be avoided during pregnancy and breastfeeding and by anyone with current or past liver disease.

What ashwagandha is and how the stress axis might be involved

Ashwagandha, botanically Withania somnifera, is also known as winter cherry and has a long tradition in Ayurvedic medicine. It is often said to have been used for more than 3,000 years. That tradition explains the interest in the plant, but it proves neither the efficacy nor the safety of today’s extracts.

Its constituents include withanolides, a group of steroidal lactones. “Steroidal” here describes a chemical structure. It does not mean a product acts like estrogen or progesterone. The composition differs between roots, leaves and extracts, and other plant components could also contribute to the effects that have been observed. Overview from the NIH Office of Dietary Supplements

One line of research concerns the hypothalamic-pituitary-adrenal axis, or HPA axis for short. It controls parts of the body’s stress response and the release of cortisol. The reproductive axis, or HPG axis, regulates, among other things, the signals for egg maturation and ovulation. The two systems can influence each other. Severe, ongoing stress, together with low energy availability, weight changes or heavy training loads, can contribute to a disrupted cycle.

Other proposed mechanisms involve oxidative stress, inflammatory signaling and the GABA system in the nervous system. They offer possible explanations for the stress-relieving and calming effects that have been observed. But an effect in a cell or animal model is not yet evidence that egg quality improves in women or that pregnancy becomes more likely. Whether ovulation or pregnancy rates change has to be studied directly in women.

How good the data on female hormones are

The evidence varies depending on the question. Stress symptoms have been studied more often than ovulation or pregnancy rates. For menopausal symptoms there are a few controlled trials; for fertility and PCOS, the step from plausible mechanisms to proven benefit is much less certain.

Menopause and perimenopause

In a randomized, double-blind trial, 100 women with perimenopausal symptoms received either placebo or 300 mg of an ashwagandha root extract twice daily for 8 weeks. Ninety-one participants completed the study. Several symptom and quality-of-life scores improved more on the extract than on placebo. Randomized trial from 2021

Estradiol also rose by a statistically significant amount, while FSH and LH fell compared with placebo. Testosterone did not differ significantly between the groups. The study therefore does not support explaining any effects purely through stress, with no hormonal changes involved. Nor does it show that ashwagandha is a reliable hormone replacement therapy. The short duration, the limited number of participants and the use of one specific extract all limit how far the findings carry over to other products and to long-term use.

Fertility and ovulation

The question makes biological sense: if heavy strain impairs the brain’s control of the cycle, reducing that strain might also help the reproductive axis. Whether ashwagandha reliably influences this chain in affected women, and whether ovulation, pregnancies or live births become more frequent as a result, remains open, however.

Individual reports of more regular cycles can prompt a hypothesis. Without a comparison group, though, it is hard to tell how much is due to a supplement, changes in energy intake, less training, relief from stress or the natural course of things. If periods stop, the cause should be investigated first, including a possible pregnancy.

Results on sperm count, motility or other parameters in men answer a different question. They can justify research interest in antioxidant mechanisms, but they cannot be transferred directly to female fertility. And improved semen parameters are not automatically evidence of more live births either.

PCOS and metabolism

In polycystic ovary syndrome, or PCOS, insulin resistance, androgens and cycle disorders can be linked. That is why researchers study substances that might influence stress responses, inflammation or glucose metabolism. Any benefit of ashwagandha is therefore a research question, not an established PCOS treatment.

The frequently cited links to the enzyme AMPK, a cellular energy sensor, are not enough to put ashwagandha on a par with metformin. Even a similar signaling pathway would not mean the same dosing, the same efficacy or the same safety. Likewise, the results of a meta-analysis of various supplements in PCOS must not be attributed wholesale to ashwagandha. Review of different supplements in PCOS

To assess this properly, we would need controlled trials with a clearly described extract, a confirmed PCOS diagnosis and relevant endpoints, such as glucose regulation, cycle regularity, ovulation or symptoms. Until then, proven measures should not be replaced by an assumed supplement effect.

How the stress and reproductive axes are connected

During a stress response, the hypothalamus releases CRH, among other signals. CRH prompts the pituitary gland to release ACTH, which in turn stimulates cortisol production in the adrenal glands. The reproductive axis relies on GnRH from the hypothalamus and on LH and FSH from the pituitary, among others.

These systems are interlinked. Heavy strain can alter the pulsing release of GnRH and so disrupt egg maturation and ovulation. That does not mean cortisol is permanently raised in every stressed woman, or that a lower cortisol level automatically restores a normal cycle.

Some studies of ashwagandha have observed lower stress scores and lower cortisol concentrations. Whether this brings back regular ovulation in women whose central cycle control is disrupted by stress or low energy availability is a separate question. This form of missing periods is called functional hypothalamic amenorrhea. Treatment of this kind of cycle disorder focuses in particular on energy availability, exercise, psychological strain and other causes. Meta-analysis on stress and anxiety

The thyroid can be affected too. Small studies and case reports suggest that ashwagandha can influence thyroid hormones. That is both a possible mode of action and a safety concern. It should not be used on your own initiative if you have an overactive thyroid or Graves’ disease, and if you take thyroid medication, talk to your doctor first. A herbal product is not a reliable way to treat an underactive thyroid yourself.

Which forms, doses and timings have been studied

Products on the market include root powder, root extracts and blends of root and leaf. They are not interchangeable. An extract with 5 percent withanolides cannot be compared with a differently standardized product on its milligram count alone.

KSM-66 is studied as a root extract; Sensoril contains root and leaf components. The profiles of individual withanolides also differ. Brand names and standardization are therefore important details when reading a study, but they are no general guarantee of quality or efficacy.

Stress studies have used 600 mg per day, among other amounts. The perimenopause trial tested 300 mg twice daily. Lower amounts such as 250 mg also come up in discussions, but they cannot be set as a general “maintenance dose.” The data justify neither a universally best dose for women nor the rule that you should simply take more if it does not seem to work. Meta-analysis on stress and anxiety

There is no convincing general basis for saying morning or evening is the better time to take it. Drowsiness and digestive complaints can affect how well it is tolerated. Combinations with rhodiola, tulsi, berberine or inositol raise a further question: results for single substances do not prove that a blend works better. Blends can also make interactions harder to predict and side effects harder to pin on a particular ingredient.

For whom the possible benefits and risks matter most

The existing clinical evidence relates most closely to adults with stress-related symptoms and to certain groups with menopausal symptoms. That does not mean you need a high cortisol level to fit a study, or that the evidence can predict how it will work for you individually.

For stress-related cycle disorders, PCOS or mild hypothyroidism, the questions differ. Possible stress relief may be supportive, but it does not replace diagnosing or treating the underlying cause. In premature loss of ovarian function, known as primary ovarian insufficiency, or in anatomical fertility problems, the stress studies so far give no grounds to expect restored ovarian function or removal of the cause.

The German Federal Institute for Risk Assessment (BfR) advises children, pregnant and breastfeeding women and people with current or past liver disease in particular to avoid ashwagandha. Besides digestive complaints and drowsiness, liver damage has also been reported. Long-term safety and a generally safe intake level have not been adequately established. BfR statement on ashwagandha

If you are trying to conceive, an early pregnancy may not yet have been noticed. Taking it on your own to boost fertility is therefore not a sound approach; discuss the product beforehand with the practice treating you. Signals of possible risk should not be equated with a miscarriage risk in humans that can be reliably quantified.

Interactions can involve thyroid medication, sedative drugs and immunosuppressants, among others. Caution is also needed with diabetes or blood pressure medication. Yellowing of the skin, dark urine, marked itching or unusual nausea while taking it should be checked by a doctor promptly.

Which tests can make sense if you have symptoms

Not every woman needs a comprehensive hormone panel before starting a supplement. A single morning cortisol reading or a commercial saliva day profile does not diagnose a general “stress axis dysregulation.” Cortisol fluctuates over the day and responds to many influences; specialized tests answer defined medical questions.

For cycle disorders, testing depends on symptoms, age, the possibility of pregnancy and how things have developed. Depending on the question, FSH, LH, estradiol, progesterone, prolactin or thyroid values may be included. For certain questions, FSH and LH are assessed around cycle day 3, but what they mean depends on the overall findings. A single value does not reliably measure the entire ovarian reserve.

In PCOS, glucose metabolism and androgens can be relevant. Fasting insulin or HOMA-IR are not automatically the decisive tests for everyone, though. Progesterone, too, has to be timed to the suspected ovulation and match the specific question, rather than being measured at any point in the cycle.

A period of 8 to 12 weeks comes up in many supplement discussions. It is no reason to repeat every hormone test across the board. It matters more to decide beforehand which symptoms should change, what risks exist and whether a lab value will actually affect a decision. Persistent cycle disorders should be investigated; an unchanged cortisol value is no reason to raise the dose on your own.

Frequently asked questions

Does ashwagandha raise estrogen or progesterone?

There is no general answer for all women and all products. A small perimenopause trial found a rise in estradiol and changes in FSH and LH. That does not establish a reliable estrogen effect, a confirmed rise in progesterone or a hormone replacement function. The specific population and the product studied are what count.

Can it help with stress-related cycle disorders?

The link between strain and cycle control makes the question plausible. But the fact that ashwagandha can influence stress scores does not yet prove that it regularly restores ovulation in affected women. Energy intake, exercise, pregnancy and other hormonal causes also have to be considered.

How are cortisol and reproductive hormones connected?

The stress and reproductive axes influence each other. Heavy, ongoing strain can alter GnRH signaling and with it LH, FSH and ovulation. The relationship is more complex than “lots of cortisol means few female hormones.” A single cortisol value does not capture it fully.

Can women with PCOS benefit?

Possible effects on stress and metabolism are research questions. A confirmed PCOS-specific effect on ovulation, androgens or pregnancy cannot be derived from them so far. That does not mean every possible effect is ruled out, but that this decision requires clinical results that fit the question.

Is ashwagandha safe when trying to conceive?

Safety in early pregnancy has not been adequately established. Pregnant and breastfeeding women should avoid it. If you are trying to conceive, discuss any planned use with a doctor beforehand rather than assuming it will boost fertility.

Which dose has been studied most often?

Among others, 600 mg of standardized extract daily, for example split into two doses of 300 mg. That is a figure from studies, not a general dosing recommendation. Nor is 250 mg an established maintenance dose; different extracts cannot be compared on milligrams alone.

What should I keep in mind about the thyroid?

Ashwagandha can influence thyroid hormones. If you have an overactive thyroid, Graves’ disease or are being treated for a thyroid condition, do not start it on your own. Whether and when TSH or free hormones are checked depends on the condition and treatment; do not adjust medication yourself.

How long before changes can be expected?

Many studies run for several weeks, often in the range of 8 to 12 weeks. That describes the observation period, not a guaranteed effect. Symptoms, the cycle and possible side effects matter as much as lab values. If a disorder persists, the cause should be investigated rather than simply supplementing for longer.

Sources

• Ren X, Wu W, Li Q, Li W, Wang X, Wang G (2024). Different supplements improve insulin resistance, hormonal functions, and oxidative stress on overweight and obese women with polycystic ovary syndrome: a systematic review and meta-analysis. Frontiers in endocrinology, 15, 1464959. https://doi.org/10.3389/fendo.2024.1464959 Source link
• Ataei-Almanghadim K, Farshbaf-Khalili A, Ostadrahimi AR, Shaseb E, Mirghafourvand M (2020). The effect of oral capsule of curcumin and vitamin E on the hot flashes and anxiety in postmenopausal women: A triple blind randomised controlled trial. Complementary therapies in medicine, 48, 102267. https://doi.org/10.1016/j.ctim.2019.102267 Source link
• Szczuko M, Zawadzka K, Szczuko U, Rudak L, Pobłocki J (2025). The Significance and Process of Inflammation Involving Eicosapentaenoic and Docosahexaenoic Derivatives in Hashimoto’s Disease. Nutrients, 17(10). https://doi.org/10.3390/nu17101715 Source link
• Akhgarjand C, Asoudeh F, Bagheri A, Kalantar Z, Vahabi Z, Shab-Bidar S, Rezvani H, Djafarian K (2022). 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 : PTR, 36(11), 4115-4124. https://doi.org/10.1002/ptr.7598 Source link
• Chang JP, Tseng PT, Zeng BS, Chang CH, Su H, Chou PH, Su KP (2023). Safety of Supplementation of Omega-3 Polyunsaturated Fatty Acids: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. Advances in nutrition (Bethesda, Md.), 14(6), 1326-1336. https://doi.org/10.1016/j.advnut.2023.08.003 Source link