Does ashwagandha help with depression? What the research does and doesn't show

The evidence doesn't support ashwagandha as a treatment for depression. A large pooled analysis of many trials shows an average improvement in depression scores, but the one trial designed to isolate self-reported mood from a placebo response found no advantage for ashwagandha at all on that specific measure.

What the evidence doesn't support

It doesn't support ashwagandha, extract or root powder, as a treatment for major depressive disorder or clinical depression. It doesn't support replacing an antidepressant or therapy with a supplement. And the two pieces of evidence below point in different directions on exactly the question that matters most — whether ashwagandha does anything for self-reported mood beyond what a placebo does — which is a reason for caution, not confidence.

What the trials found

A 2026 systematic review and dose-response meta-analysis pooled 22 randomized trials of ashwagandha on mental health outcomes, across varied populations, doses and forms. It found a large average improvement in pooled depression scores versus placebo, alongside similar improvements in stress and anxiety scores. The authors' own conclusion tempers that number: they call for well-designed, high-quality trials to resolve heterogeneity across the pooled studies and to establish an effective dosage and duration, which a pooled average this size doesn't do on its own.

A 2022 randomized, three-arm trial tested a lower-dose root-and-leaf extract (225 mg/day or 400 mg/day, well under our 1,300 mg/day of root powder) against placebo in 60 healthy adults reporting perceived stress, over 30 days. Self-reported depression, anxiety, stress and food cravings all improved over the month — but improved just as much in the placebo group. There was no significant difference between ashwagandha and placebo on any of those self-reported measures. The same trial did find a significant drop in cortisol in the lower-dose group and better scores on some cognitive tests, which is a different kind of finding than a mood-scale result, and not the same as showing an antidepressant effect.

Put together: a large pooled number says depression scores improve on average across many trials, and the one trial built specifically to separate a real effect from a placebo response on self-reported mood found no separation at all. Neither trial used whole root powder at our dose, and neither was run in a population diagnosed with depression.

Questions people ask

Does ashwagandha help with depression?

A large pooled analysis shows an average improvement in depression scores across many trials, but a trial designed to isolate the effect from placebo on self-reported mood found no advantage for ashwagandha. That's not a clear "yes," and it isn't a substitute for a depression diagnosis or treatment from a doctor.

Can ashwagandha cause depression, or make you feel depressed?

No trial found in this review reports depression or low mood as a side effect of ashwagandha. That's an absence of reported harm, not proof it can't happen in an individual case.

Does ashwagandha help with depression and anxiety together?

The 2026 pooled analysis measured depression, anxiety and stress scores together and found improvement on all three on average, with the same caveats about heterogeneity and dose noted above. The anxiety-specific breakdown is in ashwagandha and anxiety: what the research shows.

What's the right dose of ashwagandha for depression?

There isn't one. No trial has established an effective dose for depression specifically, and the trials cited above used extract, not root powder, at amounts well under our 1,300 mg/day.

When to talk to a doctor

Persistent low mood, loss of interest in things you normally enjoy, or thoughts of self-harm are reasons to talk to a doctor, not to try a supplement first. Ashwagandha is not a treatment for depression, and if you take an antidepressant or any other prescription medication, or are pregnant or nursing, ask a doctor before adding it — there's no dedicated trial testing ashwagandha alongside antidepressant medication.

Related reading: ashwagandha and anxiety: what the research shows, ashwagandha benefits: what the research does and doesn't show, and ashwagandha and medications: what to check.