Turmeric and ashwagandha: what the research does and doesn't show

The evidence doesn't support turmeric and ashwagandha together as more effective than either alone — nobody has tested that combination. What exists is two separate literatures: curcumin's anxiety evidence is a small, highly inconsistent pool of trials, mostly in people with a diagnosed condition; ashwagandha's stress evidence is more consistent, at a different dose, in different people.

What the evidence doesn't support

It doesn't support a claim that turmeric and ashwagandha work better together than either does on its own — that comparison has never been run in a trial. It doesn't support curcumin, at any dose, as a treatment for anxiety, panic disorder or generalized anxiety disorder. And it doesn't support assuming ashwagandha's more established stress data tells you anything about what a turmeric or curcumin serving would add, since the two ingredients have entirely separate research bases.

What the trials found

Curcumin's anxiety evidence is thinner and less consistent than it might look at first. A 2024 systematic review and meta-analysis pooled 8 randomized controlled trials, 567 people total, and found a statistically significant effect of curcumin on anxiety symptoms versus placebo. But the result varied enormously from trial to trial — a heterogeneity statistic of 95.6%, which means the pooled number isn't a reliable single estimate of what any one trial actually found. The abstract doesn't report one dose across the 8 trials, and the authors themselves called for more high-quality studies before drawing a firm conclusion. Two smaller trials add some texture: a 2020 trial of 60 patients with diabetic peripheral neuropathy found 8 weeks of nano-curcumin (80 mg/day) reduced depression and anxiety scores versus placebo, and a 2026 trial of 60 patients with diabetic retinopathy found 12 weeks of curcumin plus piperine (1,010 mg/day) improved sleep quality, depression, anxiety and stress scores versus placebo. Both were run in people with a diagnosed diabetes complication, not a general anxious population, and both were small.

Ashwagandha's stress evidence is the more established of the two. A 2012 randomized, placebo-controlled trial gave 64 adults with a history of chronic stress 600 mg/day of a concentrated ashwagandha root extract for 60 days and found significantly lower stress-scale scores and cortisol than placebo. A 2024 meta-analysis pooling 9 trials, 558 people total, found ashwagandha outperformed placebo on the Perceived Stress Scale, the Hamilton Anxiety Scale, and cortisol. Doses varied across those 9 trials rather than converging on one number.

Neither ingredient's trials used the two together, at any dose, in the same study. That means whatever each literature suggests on its own, there's no dose-matched evidence for a combined product.

Ingredient	Best evidence	Population	Consistency
Curcumin	Meta-analysis of 8 RCTs (567 people), significant pooled effect on anxiety	Mostly diagnosed conditions (diabetic neuropathy, retinopathy)	Very low — 95.6% heterogeneity between trials
Ashwagandha	Meta-analysis of 9 RCTs (558 people), significant effect on stress, anxiety scores and cortisol	Mixed, including general chronic-stress adults	More consistent across trials
Both together	No trial exists	—	—

Questions people ask

Can you take turmeric and ashwagandha together?

There's no trial of the combination, so there's no evidence describing what taking them together does beyond what either does alone. Whether that's appropriate for you is a separate safety question worth raising with a doctor or pharmacist, especially alongside any medication.

Is turmeric or ashwagandha better for stress?

This page doesn't rank one against the other. Ashwagandha's stress trials are more consistent as a body of evidence than curcumin's anxiety trials, which is a description of trial quality, not a recommendation to substitute one for the other or for medical care.

Does ashwagandha tea with turmeric help anxiety?

No trial has tested that preparation. The research above used capsule-form extracts at specific milligram doses, not a home-brewed tea, so the doses and forms don't transfer to a cup made from loose powder.

How much turmeric and ashwagandha should I take together?

There's no studied combined dose. The ashwagandha figures above come from trials that didn't include curcumin, and the curcumin trials didn't include ashwagandha, so neither number was established with the other ingredient present.

When to talk to a doctor

Anxiety or chronic stress that interferes with daily life, work or sleep is worth raising with a doctor. Neither turmeric nor ashwagandha is a treatment for anxiety, panic disorder or a stress-related diagnosis, and nothing in the evidence above supports using either, alone or combined, as a substitute for evaluation, therapy or medication a doctor might recommend. Ashwagandha in particular should be discussed with a doctor if you're pregnant or nursing, have a thyroid condition, or take other medication; the same caution applies to turmeric or curcumin if you take a blood thinner or have liver disease.

Related reading: does turmeric help with anxiety?, who should not take turmeric, and turmeric benefits: what the research does and doesn't show.