Damiana does not appear to increase your body’s estrogen production. In fact, lab research shows the opposite: damiana extract inhibits aromatase, the enzyme responsible for converting testosterone into estrogen. However, the picture is more nuanced than a simple yes or no, because damiana also contains plant compounds that can mimic estrogen weakly in the body. These two effects pull in different directions, and understanding both is key to knowing what damiana might actually do to your hormones.
How Damiana Affects Estrogen Production
Your body makes estrogen through a process called aromatization, where an enzyme called aromatase converts androgens (like testosterone) into estrogen. A study published in the Journal of Ethnopharmacology tested damiana’s methanolic extract and 24 individual compounds isolated from the plant against this enzyme. The extract showed dose-dependent inhibition of aromatase, meaning the more damiana was present, the more the enzyme was suppressed. Two specific flavonoids in damiana, pinocembrin and acacetin, were the most potent inhibitors.
By blocking aromatase, damiana could theoretically help preserve testosterone levels rather than letting them be converted to estrogen. This is actually the reason researchers originally studied it: damiana has a long history of use as an aphrodisiac, and they hypothesized its reputation might stem from keeping testosterone levels higher. As people age, aromatase activity tends to rise while testosterone production drops, which contributes to fatigue, reduced muscle mass, lower libido, and erectile dysfunction. Aromatase inhibitors from natural sources are an active area of research for this reason.
Damiana’s Mild Estrogenic Activity
Here’s where it gets complicated. The same study that found aromatase-inhibiting properties also detected weak estrogenic activity in three of damiana’s compounds. When tested in a yeast estrogen screening assay (a lab method that measures whether a substance activates estrogen receptors), three compounds triggered a response. These compounds act as phytoestrogens, plant-based molecules that are structurally similar enough to estrogen to bind to estrogen receptors, but far weaker than the estrogen your body produces naturally.
Interestingly, one compound, pinocembrin, showed up on both sides. It inhibited aromatase (reducing estrogen production) while also displaying some estrogenic receptor activity on its own. This dual action is common with plant flavonoids and is one reason herbal supplements can have complex, sometimes contradictory-sounding effects. In practical terms, the estrogenic activity of these compounds is mild compared to your body’s own estrogen, so damiana is unlikely to cause the kind of hormonal shift you’d see from, say, hormone replacement therapy.
What This Means for Libido and Sexual Health
Most people searching about damiana and estrogen are really trying to figure out whether it works as an aphrodisiac, and if hormones are the reason. The answer appears to be that damiana does have measurable effects on sexual function, but the mechanism likely involves more than just hormone levels.
In animal studies, damiana at 80 mg/kg significantly increased the percentage of sexually exhausted male rats that resumed sexual activity and reduced the recovery time between ejaculations. The researchers identified caffeine, arbutin, and flavonoids as the main active compounds and noted that damiana’s pro-sexual effects resembled those of yohimbine, a well-known stimulant compound that works through the nervous system rather than through hormones. This suggests damiana may boost libido partly through neurotransmitter pathways, not just by tweaking estrogen or testosterone.
Small clinical studies in humans point in a similar direction. A pilot study in postmenopausal women found that a supplement containing damiana significantly improved five out of six sexual function parameters after nine weeks of daily use. Another trial in men with erectile dysfunction reported significant improvement in erectile function scores after 12 weeks. In both cases, damiana was part of a multi-ingredient formula, making it hard to isolate damiana’s specific contribution.
Damiana in Menopause Supplements
Damiana is a common ingredient in herbal formulas marketed for menopausal symptoms, which may be part of why people associate it with estrogen. One combination product containing damiana alongside evening primrose oil, ginseng, and royal jelly was studied in menopausal women and found to improve overall well-being during the menopausal transition. But because these products blend multiple ingredients, the benefit could come from any of the components or from their interaction. Damiana’s mild phytoestrogenic compounds may contribute something, but no study has isolated damiana alone for menopause relief in humans.
Safety and Hormone-Sensitive Conditions
Because damiana contains compounds with both aromatase-inhibiting and weak estrogenic properties, anyone with a hormone-sensitive condition should approach it carefully. Memorial Sloan Kettering Cancer Center notes that damiana has not been studied in cancer patients and has not been shown to treat cancer in humans. The lack of research means there is no clear safety data for people with estrogen-receptor-positive breast cancer or other hormone-sensitive conditions.
Reported side effects from damiana are generally mild, though mental status changes including agitation, confusion, and hallucinations have been flagged as reasons to stop use immediately. No studies have specifically tracked hormonal side effects like menstrual cycle changes in women taking damiana, so those effects remain undocumented rather than ruled out.
The Bottom Line on Damiana and Estrogen
The net hormonal effect of damiana leans toward reducing estrogen production (by inhibiting aromatase) rather than increasing it. It does contain weak phytoestrogens that can activate estrogen receptors at low levels, but these are far less potent than your body’s own hormones. If you’re taking damiana hoping it will raise your estrogen levels, the available evidence suggests it won’t. If you’re concerned it might raise estrogen in unwanted ways, the aromatase-inhibiting action actually works against that. Most of damiana’s effects on sexual health appear to involve pathways beyond simple hormone manipulation, likely including nervous system stimulation similar to yohimbine. All of this evidence comes from lab studies and small clinical trials, so the strength of these conclusions is limited.