Research
Ashwagandha Research
Plain-language summaries of the published ashwagandha research. Every summary links to its primary sources, and we never present popularity as evidence.
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Ashwagandha and Anxiety
Meta-analyses report anxiety-symptom differences with ashwagandha, but the pooled evidence is heterogeneous and has been rated low certainty.
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Ashwagandha and Cognition
Small trials in adults with mild cognitive impairment and healthy young adults report different findings; they do not establish a general cognitive benefit.
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Ashwagandha and Sleep Quality
A five-trial review reported a small pooled sleep effect. Subgroup patterns do not establish individual dose recommendations or long-term safety.
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Ashwagandha, Strength and Endurance
One training trial reported greater estimated endurance and arm/chest circumference changes, while strength and thigh changes did not differ significantly.
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Ashwagandha and Salivary Hormones in Men
One small crossover trial in overweight men reported salivary testosterone and DHEA-S changes, without significant fatigue or well-being benefits versus placebo.
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Ashwagandha and Thyroid Function
A 50-person pilot measured thyroid indices in subclinical hypothyroidism; it does not establish symptom relief or replace prescribed thyroid management.
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Ashwagandha Dosage, Timing and Cycling
Selected ashwagandha trials used daily regimens. Their dose and timing protocols do not establish a universal dose or a cycling schedule.
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Ashwagandha for Women: Menopause and Sexual Health
Selected women’s trials report menopause or sexual-function scores; they do not establish fertility, cycle regulation or contraceptive effects.
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Ashwagandha, Medicines and Supplement Combinations
Ashwagandha may interact with several medicine classes. Review the NIH cautions, drowsiness and limits of short-term safety evidence.
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KSM-66, Sensoril and Shoden: Extract Evidence
Selected KSM-66, Sensoril and Shoden trials used different preparations, doses and populations; they cannot establish an extract ranking.
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Ashwagandha for Stress and Cortisol
Randomized trials and meta-analyses have studied ashwagandha for reductions in perceived stress and serum cortisol in stressed adults.
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Ashwagandha Safety and Tolerability
Ashwagandha safety: short-term evidence, side effects, liver injury reports, pregnancy and thyroid cautions, and possible medication interactions.