Does Ashwagandha Actually Boost Testosterone and Strength?

Does ashwagandha actually boost testosterone? In men, a large 2026 meta-analysis says yes, modestly, testosterone rose by an average of 57 ng/dL across 23 pooled trials, with no significant change in women. The bigger, more consistent effect in that same review was on cortisol, which dropped sharply, so the honest framing is "a real stress-hormone effect with a smaller, male-specific testosterone bump," not a muscle-building miracle.

Here's what the actual trials measured, what a separate strength study found, and what the dosing and safety data say.

Does the research actually back up a testosterone increase?

A systematic review and meta-analysis published in Planta Medica in 2026 pooled 23 randomized, placebo-controlled trials covering 1,706 participants, using a pre-registered protocol. In men, testosterone rose by an average of 57.43 ng/dL. In women, the average change was only 5.09 ng/dL and not statistically significant, and the authors reported the difference between sexes itself was significant. Estradiol didn't change in either sex.

The same review found a much larger effect on cortisol, a pooled standardized mean difference of -1.18, which is a big effect size by the usual benchmarks, plus a rise in serotonin. Thyroid hormones were mostly unaffected, except for a modest rise in T4. The authors note meaningful heterogeneity across the included trials, meaning results varied study to study more than a single pooled number lets on, so individual results won't all look like the average.

What about strength and muscle, not just hormones?

The hormone data doesn't automatically mean more muscle or strength, so it's worth looking at a trial that actually measured training outcomes directly. An 8-week, double-blind, placebo-controlled trial of 57 men new to resistance training had both groups follow the same training program, and the ashwagandha group (300 mg of a standardized root extract, twice daily) gained significantly more one-rep max strength on bench press and leg extension than placebo, along with greater increases in arm muscle size and a bigger drop in a blood marker of exercise-induced muscle damage.

That's a genuinely interesting result, but it's one trial, in untrained young men, over 8 weeks, testing one specific branded extract. It hasn't been widely replicated in trained lifters or over longer periods, so it's reasonable to be hopeful without assuming the effect is as large or as reliable as it looks in a single paper. If you're looking for a supplement with a longer track record specifically for training performance, citrulline malate has more replication behind it, even though its effect size is smaller.

How does this compare to other "testosterone booster" claims?

Most over-the-counter testosterone boosters don't have trial evidence behind them at all, as covered in how to increase testosterone naturally. Ashwagandha is a partial exception, it has actual randomized, placebo-controlled human trials showing a measurable effect in men. But "partial exception" is the right amount of enthusiasm here: the effect size (an average of roughly 57 ng/dL) is modest next to what sleep deprivation or high body fat can cost you, and most of the supporting trials test specific standardized extracts rather than whatever is in a random bottle on a shelf.

What dose and form do the studies actually use?

Most of the trials showing an effect use 300 to 600 mg per day of a standardized root extract, often split into two daily doses, with the branded KSM-66 extract showing up repeatedly in the strength and testosterone research specifically. Products that don't list a standardized extract or withanolide concentration are harder to compare to what was actually studied, since "ashwagandha" on a label can mean very different concentrations of the active compounds.

Is it safe to take regularly?

For most healthy adults, short-term use, up to about three months is what's actually been studied, appears well tolerated. The most common side effects reported in trials are mild: drowsiness, stomach upset, and loose stools. NIH's Office of Dietary Supplements and its National Center for Complementary and Integrative Health both note it's not clear whether longer-term use is safe, and both flag rare case reports of liver injury and effects on thyroid hormone levels. Pregnant or breastfeeding people, anyone with a thyroid condition or on thyroid medication, and anyone with a hormone-sensitive prostate cancer should talk to a doctor before using it, since ashwagandha may raise testosterone.

Whether a supplement like ashwagandha is actually doing anything for you specifically is a question your own training data can answer better than how a session felt. OneFit logs every set and rep, so if you add something new to your routine, you can look at whether your strength numbers are actually trending up over the following weeks instead of guessing, and Ori builds your plan around what you've actually logged.

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FAQ

Does ashwagandha actually raise testosterone? In men, the best current evidence says yes, modestly. A 2026 systematic review and meta-analysis pooling 23 randomized, placebo-controlled trials and 1,706 participants found testosterone rose by an average of 57.43 ng/dL in men, with no significant change in women. The same review found a large drop in cortisol, which may be the more reliable effect.

Will ashwagandha help you build muscle or get stronger? There's one notable trial suggesting it can help alongside training, not on its own. An 8-week study of 57 untrained young men had both groups lift weights, and the ashwagandha group gained significantly more bench press and leg extension strength than placebo. It's a single, small, short trial on a specific branded extract, so treat it as a promising data point, not settled proof.

What dose of ashwagandha do the studies actually use? Most of the positive trials used 300 to 600 mg per day of a standardized root extract, commonly the branded KSM-66 extract, split into two doses. Products that don't disclose a standardized extract or withanolide content are harder to compare to the research.

Does ashwagandha work the same way for women? Not based on the testosterone data specifically. The 2026 meta-analysis found no significant testosterone increase in women, and the authors reported a statistically significant difference between the sexes. Ashwagandha's cortisol-lowering effect doesn't appear to be sex-dependent in the same way, so the stress-related benefits may still apply even where the testosterone effect doesn't.

Is ashwagandha safe to take every day? For most healthy adults, short-term use (up to about 3 months) appears well tolerated, with mild drowsiness or stomach upset the most common issues. NIH's Office of Dietary Supplements and National Center for Complementary and Integrative Health both flag rare cases of liver injury and effects on thyroid hormones, and advise against it during pregnancy or for anyone with a hormone-sensitive prostate cancer, thyroid condition, or who's on thyroid medication, without talking to a doctor first.