Ashwagandha and maca: what the evidence says about taking them together

Ashwagandha and maca are both sold on a "vitality" or libido-adjacent positioning, but they've never been tested together. Maca's own trials measured self-reported sexual desire and semen parameters in men; ashwagandha's closest comparison used root powder at several times a typical capsule dose, in a different population.

What the evidence doesn't support

It doesn't support a claim that ashwagandha and maca work better together than either alone — that combination has never been tested. It doesn't support carrying maca's dose findings (1,500-3,000 mg/day) over to a product that also contains ashwagandha, since none of maca's trials included it. And it doesn't support treating either ingredient's semen-parameter research as a fertility treatment; that's a question for a doctor.

What the trials found

A 12-week, double-blind, placebo-controlled trial gave healthy men aged 21-56 either 1,500 mg/day or 3,000 mg/day of maca, or placebo. Starting at 8 weeks, the maca groups reported greater sexual desire than placebo — an effect that showed up independently of changes in mood scores, and without any measured change in testosterone or estradiol levels in either group. A separate, smaller study with no placebo arm gave nine healthy men the same 1,500-3,000 mg/day dose range for 4 months and found increases in semen volume, sperm count and sperm motility, again without a measured change in reproductive hormones.

Ashwagandha's nearest comparison trial used a much higher dose in a different population. Sixty men with reduced sperm counts or motility — heavy smokers, men under psychological stress, or unexplained cases — took 5 grams a day of ashwagandha root powder for three months, compared against fertile men who received no treatment. Stress markers and several semen-quality measures improved versus baseline, with no placebo group to isolate the effect. Five grams a day is roughly 3.8 times a typical 1,300 mg/day root-powder capsule dose, and the population — men already being evaluated for reduced fertility — isn't the same as healthy men taking maca in the trials above.

No study has tested maca and ashwagandha together, at any dose, in any population.

Ingredient	Best evidence	Population	Dose in that trial
Maca	Greater self-reported sexual desire vs placebo, no hormone change	Healthy men, 21-56	1,500-3,000 mg/day, 12 weeks
Ashwagandha	Improved semen-quality measures vs baseline, no placebo group	Men with reduced sperm counts/motility (n=60)	5 g/day root powder, 3 months
Both together	No trial exists	—	—

Questions people ask

Can you take ashwagandha and maca together?

There's no trial of the combination, so there's no research describing an added effect. Each has its own separate safety profile and cautions, so checking with a doctor or pharmacist before combining them is reasonable, particularly around any medication you take.

What is ashwagandha maca fenugreek good for?

Ashwagandha, maca and fenugreek each have their own separate trial bases, at their own separate doses, and no trial has tested the three combined. A blend listing all three doesn't mean each is present at an amount any individual trial tested.

When to talk to a doctor

Concerns about sexual desire, semen quality or fertility are worth raising with a doctor for proper evaluation rather than addressing with a supplement pairing first. Neither maca nor ashwagandha is a treatment for a diagnosed reproductive or hormonal condition, and nothing in the evidence above supports using either, alone or combined, as a substitute for medical evaluation.

Related reading: what is ashwagandha, ashwagandha dosage, and ashwagandha interactions.