Damiana properties: herbal aphrodisiac, stress and concentration, what science says

Damiana is regarded as one of the most valued herbal aphrodisiacs in the world and simultaneously has one of the thinnest research backgrounds among popular herbs. These two facts can only be reconciled by stating clearly what has been measured, on whom, and what is still unknown. Reviews of this plant describe results almost exclusively from test tubes and animal models, and the few human data come from multi-ingredient preparations in which damiana was one of several herbs. This article navigates this distinction: it shows the composition of the plant, summarizes two studies that actually measured its effects, and separates documented mechanisms from those circulating online without support.

KEY INFORMATION
• In a study on sexually exhausted male rats, the aqueous extract of Turnera diffusa increased the percentage of animals completing a copulatory series and shortened the post-ejaculation interval (Estrada-Reyes et al., Journal of Ethnopharmacology, 2009).
• HPLC analysis of the same extract showed caffeine, arbutin, and flavonoids as the main components, so damiana is not a caffeine-free herb.
• An anxiolytic effect was noted in a separate work by this team, with an extract of 10 mg/kg in rats, without affecting the animals' mobility (Estrada-Reyes et al., 2013).
• The review of the genus Turnera states that most described properties have been studied exclusively in chemical, cellular, or animal tests (Szewczyk and Zidorn, Journal of Ethnopharmacology, 2014).

What is damiana and what does it contain?

Damiana, botanically Turnera diffusa, is a shrub from the Passifloraceae family growing in Mexico, Central America, and northern South America. The genus Turnera currently includes 135 recognized species, of which about six are used in traditional medicine, and Turnera diffusa is the most highly regarded herbal aphrodisiac among them (Szewczyk i Zidorn, Journal of Ethnopharmacology, 2014). The raw material is the leaves.

The chemical composition of the genus is described in more detail than its effects. The same review lists 22 different flavonoids, seven cyanogenic glycosides, maltol glycoside, phenolic compounds, monoterpenoids, sesquiterpenoids, triterpenoids, polyprenol ficaprenol-11, fatty acids, and caffeine. The last item is often omitted in commercial descriptions, yet it is significant: HPLC-ESI-MS analysis of the active aqueous extract from the leaves indicated caffeine, arbutin, and flavonoids as the main compounds present (Estrada-Reyes i in., Journal of Ethnopharmacology, 2009).

Popular descriptions provide exact percentage contents of apigenin or essential oils for damiana. We did not find a study from which these numbers originate, and the review of the genus Turnera does not include them, so they are not present in this text. However, the authors of the review note that, with a few exceptions, most traditional uses and experimentally confirmed properties have not yet been attributed to a specific compound or class of compounds.

Does damiana really work as an aphrodisiac?

In animals, yes, but it has not been demonstrated in humans. The Estrada-Reyes team administered an aqueous extract of Turnera diffusa in doses of 20-80 mg/kg to male rats previously brought to sexual exhaustion, with yohimbine 2 mg/kg as a comparison. At 80 mg/kg, the extract significantly increased the percentage of males that completed one ejaculatory series and started another, and shortened the post-ejaculation interval. The authors emphasize that this occurred without an increase in the animals' locomotor activity (Estrada-Reyes et al., 2009).

Four years later, the same team investigated how this works. An extract of 10 mg/kg and sildenafil 10 mg/kg were administered to rats with low sexual activity. Both primarily shortened the time to ejaculation, and administration of a nitric oxide synthase inhibitor abolished this effect in both groups. The authors conclude that the prosexual effect of damiana occurs via the nitric oxide pathway, mainly at the central level (Estrada-Reyes i in., Journal of Ethnopharmacology, 2013).

However, it must be clearly stated where this foundation ends. The review of the genus Turnera notes that the effects on sexual functions have been studied in humans, but in a preparation containing other potentially active ingredients alongside Turnera diffusa, so the result cannot be attributed solely to damiana. The same note applies to the only study on humans regarding anti-obesity effects. In other words: the animal model is consistent, while a clinical trial with just damiana has not been published. Separately, we described what studies on CBD a seksem.

Where does the attributed anxiolytic effect of damiana come from?

From two sources that are worth separating. The first is direct measurement: in a 2013 study, the extract of damiana at a dose of 10 mg/kg produced an anxiolytic effect in the burying test and in the open field, without changing the animals' mobility. The authors considered this an advantage for sexual application, as anxiety itself worsens results in these tests.

The second source is indirect and concerns apigenin, a flavonoid present in damiana. Apigenin was isolated from chamomile flowers and shown to bind to the central benzodiazepine receptor, competitively inhibiting the binding of flunitrazepam. In the elevated plus maze test in mice, it produced a clear anxiolytic effect without sedation and without muscle relaxation at doses similar to those used for benzodiazepines, and no anticonvulsant effects were noted; only a tenfold increase in dose produced mild sedation (Viola i in., Planta Medica, 1995).

However, caution is warranted here, which popular descriptions overlook. Violi's work concerns apigenin isolated from chamomile, not the extract from damiana, and the review of the genus Turnera attributes apigenin in this plant a role as an analgesic component, established in animal experiments. The statement about partial agonism towards benzodiazepine receptors, repeated in descriptions of damiana, is therefore a misapplication of one finding to another plant. If you are looking for an herb for stress with its own separately studied background, we described it in connection with tulsi jako adaptogenu na stres.

Does damiana improve concentration and provide energy?

Tradition claims so, but there are no studies on concentration in humans. However, there is one chemical finding that explains part of the reports of stimulation, which is usually not mentioned in commercial descriptions of damiana: caffeine was detected in the active aqueous extract from the leaves, and a review of the genus Turnera confirms its presence in this group of plants. Therefore, damiana is not a neutral herb for the nervous system in the evening.

It is worth rejecting an explanation that circulates in texts about damiana. It is repeated that arbutin, upon breaking down to hydroquinone, stimulates the central nervous system. We did not find a study that demonstrated this, and arbutin is described in the literature in a completely different context. Since caffeine was found in the same extract, a simpler explanation is at hand and does not require inventing a new mechanism.

There remains an intermediate path that can be described honestly without referring to non-existent research. Anxiety and tension distract attention, so anything that reduces them improves the subjective sense of focus. However, the anxiolytic effect of damiana was measured on rats, not on humans in cognitive tasks, so it is a hypothesis, not a conclusion. Plants with studies directly related to memory and attention are a different matter; we described it in the text about bacopa monnieri for memory and concentration.

We noticed something while reviewing this text that changes its tone. The most frequently repeated statement about damiana says that it reduces anxiety in mice comparably to a low dose of diazepam, and it is supported by the work of Estrada-Reyes from 2009. We referred to this work: rats were studied, not mice, the comparison was yohimbine, and the authors only noted that the observed effects were not associated with increased motor activity or anxiety behaviors. This work does not report any reduction in anxiety at all. The anxiolytic effect exists, but it comes from another work by the same team from 2013, and was measured using different tests. With herbs that have a thin research base, such a shift by one publication can turn a cautious conclusion into a promise that no one made.

How was damiana traditionally used?

The tradition of damiana is broad, and it is this tradition, not research, that has built its current position. An ethnobotanical review of the genus Turnera lists medicinal uses for species such as treating anemia, bronchitis, cough, diabetes, fever, fungal diseases, gastrointestinal disorders, pain, lung and respiratory diseases, skin conditions, and women's health issues. Plants from this genus have also been used as abortifacients, expectorants, and laxatives (Szewczyk and Zidorn, 2014).

Turnera diffusa stands out in this context as the most highly valued species in the role of a herbal aphrodisiac. It reached Europe in the 19th century, like many raw materials from the New World, and entered the pharmaceutical market as a remedy for ailments described in a language that is no longer used today. In Polish herbal trade, it appears as dried herb and as an extract, outside of the pharmacopoeial circulation, which means there is no uniform quality standard among producers. Checking whether the species name Turnera diffusa is on the packaging is therefore the basic thing to do when purchasing. Herbs with a turbulent pharmaceutical history are, by the way, a separate topic, described in relation to wormwood and absinthe.

In what forms is damiana found?

Three forms are most commonly sold and differ primarily in how much of the raw material actually passes into the final product. An infusion of dried leaves is the form closest to traditional use and the most variable: some volatile compounds are lost during brewing, and the taste is distinctly bitter, with a camphor note. A dry extract in capsules is more consistent between batches, provided the manufacturer specifies the degree of concentration. An alcohol tincture extracts different fractions than water and for this reason is not simply a stronger tea.

We do not provide milligrams or the number of servings per day here. The reason is simple: there is no clinical trial for damiana in humans from which such a number could be derived. All doses mentioned in this text are animal doses converted to kilograms of body weight and cannot be directly translated to humans by simple multiplication. If you are considering regular use of damiana, discussing the amount with a doctor or pharmacist is the right place to establish the dosage, especially when on ongoing pharmacotherapy.

A separate note concerns smoking damiana leaves, which is present in Mexican tradition and is returning today as a trend. The products of combustion arise regardless of how valuable the plant itself is, so the benefits of the herb do not offset this method of administration. An infusion or extract is incomparably safer in this regard.

When should caution be exercised with damiana?

Three situations arise directly from the composition and described properties of the genus, rather than from a precautionary template. The first concerns diabetes: among the experimentally confirmed properties of the genus Turnera, its anti-diabetic effect is mentioned, so combining damiana with glucose-lowering medications requires a conversation with a doctor and attention to hypoglycemia symptoms.

The second is related to the presence of seven different cyanogenic glycosides in the genus. This is a group of compounds where the amount of raw material matters, and consuming large portions of the infusion without consultation is not a good idea. The third concerns pregnancy and breastfeeding: plants from this genus have traditionally been used as abortifacients, and there is simply no data on the safety of damiana during these periods, so discontinuation is the only reasonable decision.

It is also worth noting what we did not find in the literature, although it is repeated in texts about damiana. The warning that arbutin enhances the effect of warfarin and requires INR monitoring has no source to which one could refer. This does not mean that the interaction does not occur. It means that no one has demonstrated it, and with ongoing anticoagulant treatment, any new herb should be discussed with the attending physician.

Frequently Asked Questions

What is damiana and where does it come from?

Damiana, or Turnera diffusa, is a shrub from the Passifloraceae family that grows in Mexico and Central America. The genus Turnera includes 135 recognized species, of which about six are used in traditional medicine, and damiana is the most highly valued plant aphrodisiac among them (Szewczyk and Zidorn, 2014). The herbal raw material is the leaves.

Does damiana really work as an aphrodisiac?

In rats, yes, but it has not been demonstrated in humans. An aqueous extract given to sexually exhausted males increased the percentage of animals completing a copulatory series and shortened the break after ejaculation (Estrada-Reyes et al., 2009). Data from humans come exclusively from multi-ingredient preparations where damiana was one of several herbs.

Does damiana help with stress and anxiety?

The anxiolytic effect was measured in rats with an extract of 10 mg/kg, in the burying test and in an open field, with no effect on the animals' mobility (Estrada-Reyes et al., 2013). An earlier work by the same team from 2009, which most descriptions refer to, does not report any reduction in anxiety at all. There is a lack of studies in humans.

Does damiana contain caffeine?

Yes. The HPLC-ESI-MS analysis of the active aqueous extract from the leaves indicated caffeine, arbutin, and flavonoids as the main compounds present (Estrada-Reyes et al., 2009), and a review of the genus Turnera confirms the presence of caffeine in this group of plants. This is worth considering when planning the time of day.

Does damiana affect concentration and energy?

There are no studies on concentration in humans. The repeated explanation that arbutin, upon breaking down to hydroquinone, stimulates the central nervous system lacks a source to refer to. The presence of caffeine in the extract explains reports of stimulation more simply and without assuming a new mechanism.

Is damiana safe and what should it not be combined with?

Caution is advised with diabetes, as the genus Turnera is attributed with antidiabetic effects, making it possible to overlap with medications that lower glycemia. During pregnancy and breastfeeding, damiana should not be used, as plants from this genus have been used as abortifacients, and there is no safety data.

In the category herbs you will find, among others, ginseng herb and guarana extract, which are raw materials from the same category of traditional tonifying herbs. Damiana is not included in this assortment.

This article is for informational and educational purposes and does not constitute medical advice. Before starting supplementation, consult your doctor, especially if you are taking medications regularly, are pregnant or breastfeeding, or have a chronic illness.

Author: Michał Waluk · Opublikowano: 2026-05-29 · Aktualizacja: 2026-08-16