Ashwagandha for Women: What the Research Actually Shows
Hormone balance, thyroid health, fertility, stress — ashwagandha is studied across all of these. We separate the strong evidence from the speculation.
Ashwagandha research in women has expanded significantly in the past decade, with multiple randomised controlled trials examining its effects on hormones, stress, fertility, and thyroid function.
Stress and cortisol: The most robust evidence. A 2019 double-blind RCT (60 women, 8 weeks) showed 300mg KSM-66 Ashwagandha twice daily reduced cortisol by 22.2% vs placebo. Similar trials confirm the effect is consistent in women.
Thyroid function: Two small trials suggest Ashwagandha may improve TSH and T4/T3 levels in hypothyroid patients. The mechanism is unclear, but withanolides appear to stimulate thyroid hormone production. Important: if you have hyperthyroidism, use caution — this effect can be a contraindication.
Sexual function and libido: A 2015 RCT (50 women, 8 weeks) found 300mg twice daily significantly improved sexual function scores, arousal, lubrication, and satisfaction vs placebo. The effect was attributed to reduced stress and improved hormonal environment.
Fertility: Limited evidence, but animal studies show withanolides may support follicular development. Human trials are underway. Don't use Ashwagandha during pregnancy — it's classified as an abortifacient in traditional Ayurvedic literature and no human safety data exists for pregnancy.
Our recommendation: Ashwagandha is safe and well-evidenced for stress, sleep, and cortisol reduction in women at 300–600mg/day of a standardised extract. For thyroid or fertility applications, work with a qualified endocrinologist or gynaecologist.
Note: This article is for informational purposes only. Consult a qualified healthcare practitioner before making changes to your supplementation or diet.