Ashwagandha has a long reputation as an aphrodisiac in traditional Indian medicine, but the clinical picture is more nuanced than that label suggests. It does appear to improve several measures of sexual function in both men and women, primarily by lowering stress hormones and raising testosterone. However, at least one study’s authors explicitly cautioned that their results “should not be interpreted as implying that ashwagandha is an aphrodisiac,” because it didn’t significantly increase sexual desire on its own. The truth sits somewhere in between: ashwagandha can meaningfully support sexual health, but it works indirectly rather than flipping a switch.
How Ashwagandha Affects Sexual Function
The connection between ashwagandha and sex comes down to two pathways. The first is stress reduction. Chronic stress raises cortisol, and elevated cortisol is directly linked to sexual dysfunction in both men and women. Ashwagandha consistently lowers cortisol in clinical trials, which removes one of the most common brakes on healthy sexual function. When your body is stuck in a stress response, libido is one of the first things to drop. Bringing cortisol back to normal can restore what stress took away.
The second pathway involves testosterone. In a study of overweight men over 40, eight weeks of ashwagandha supplementation produced 14.7% higher testosterone levels and 18% higher levels of DHEA-S (a precursor hormone) compared to placebo. Testosterone plays a role in sexual desire for both sexes, and age-related declines in testosterone are associated with reduced libido, particularly in women. Ashwagandha appears to nudge these levels upward, which may partially explain the sexual benefits people report.
There’s also a vascular component. Lab research has shown that compounds in ashwagandha increase nitric oxide production in blood vessel cells. Nitric oxide relaxes blood vessels and improves blood flow, which is the same basic mechanism behind common erectile dysfunction medications. This effect has been demonstrated in cell and animal studies, though it hasn’t been isolated as a standalone benefit in human sexual health trials yet.
What the Research Shows in Men
A randomized, placebo-controlled study gave 100 healthy men (ages 30 to 50) 300 mg of ashwagandha root extract twice daily for eight weeks. Researchers measured sexual desire, erectile function, orgasm quality, and overall satisfaction at baseline and then at weeks 2, 4, and 8. By the end of the study, the ashwagandha group showed statistically significant improvements in sexual desire scores, orgasmic function, and overall sexual satisfaction compared to placebo. Semen quality also improved.
A separate meta-analysis of four clinical trials found that ashwagandha supplementation significantly increased sperm concentration, semen volume, and sperm motility in men with low sperm counts. So the benefits for men extend beyond subjective desire into measurable reproductive health markers.
What the Research Shows in Women
The evidence in women is a bit more complicated. One pilot study found that while ashwagandha improved overall sexual function scores, it failed to significantly improve the “desire” domain specifically. The number of total sexual encounters also didn’t change. The researchers behind that study were the ones who warned against calling ashwagandha an aphrodisiac based on their findings.
A larger and more recent randomized, placebo-controlled trial told a different story. In that study, healthy women taking ashwagandha saw their overall sexual function scores rise from 14.20 at baseline to 22.62 at eight weeks, compared to a rise from 14.17 to 19.25 in the placebo group. Importantly, improvements were significant across all six measured categories: desire, arousal, lubrication, orgasm, satisfaction, and pain during sex. That’s a meaningful gap, and the fact that desire did improve in this study suggests the earlier pilot may have been too small to detect the effect.
The proposed explanation is twofold. By lowering cortisol, ashwagandha removes stress-related barriers to sexual function. By raising testosterone slightly, it may counteract the natural age-related decline that contributes to low desire in some women.
How Long It Takes to Work
Ashwagandha is not a fast-acting supplement for sexual health. The studies that found benefits used treatment periods of eight weeks, with assessments at two, four, and eight weeks. Most of the significant improvements appeared by the eight-week mark. If you’re expecting results in a few days, this isn’t the right supplement for that. The effects build gradually as cortisol levels decrease and hormonal balance shifts over time.
Its Traditional Reputation
In Ayurvedic medicine, ashwagandha has been classified as a “Vajikarana Rasayana,” a category of herbs used to treat infertility, weakness, and sexual dysfunction. This isn’t a recent marketing claim. Formulations based on ashwagandha have been used for centuries in this tradition, and recent research has provided some validation. An animal study specifically designed to test the traditional aphrodisiac claim concluded that ashwagandha formulations did exhibit aphrodisiac effects, supporting the historical use. The modern clinical trials are essentially catching up to what practitioners of traditional medicine have long observed, though the mechanism turns out to be more about stress relief and hormone balance than a direct boost to desire.
Safety Considerations
According to the National Center for Complementary and Integrative Health, ashwagandha appears safe for short-term use (up to three months). There isn’t enough data to draw conclusions about long-term safety. Common side effects include drowsiness, stomach upset, diarrhea, and vomiting. Rare cases of liver injury have been reported.
Several groups should avoid ashwagandha entirely. It should not be used during pregnancy or breastfeeding. People with autoimmune diseases or thyroid disorders are advised against it, as are those preparing for surgery. Because it can raise testosterone levels, people with hormone-sensitive prostate cancer should not take it. Ashwagandha can also interact with medications for diabetes, high blood pressure, seizures, and thyroid conditions, as well as sedatives and immunosuppressants.