A New World herb of ancient lineage

Damiana grows wild in hot, sunny regions from the American Southwest to northern South America. The leaves of the yellow-flowered shrub were once used by the Aztecs, the Maya and other native groups for a variety of medicinal purposes and as an aphrodisiac.

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Uses: Over the last few centuries, damiana has been used to treat bedwetting, constipation, impotence, depression, lethargy, anxiety, hot flashes, diabetes and obesity. Today’s

homeopaths sometimes recommend it for female sexual dysfunction.

Dose: Doses of commercial damiana preparations -- such as capsules and liquid extracts -- vary widely, so check labels for manufacturer recommendations. Damiana tea can be made using 2 to 4 grams of the herb per cup of boiling water. Three cups a day is recommended for most conditions.

Precautions: Too much of the herb can cause headaches and sleeplessness. A large overdose (several ounces or more of the leaves) may result in seizures. Damiana may have an effect on blood sugar levels, so diabetics should consult their doctors before taking the herb. Damiana is not recommended for pregnant women since little is known about how it may affect the fetus.

Research: Animal studies of damiana’s effects on diabetes and weight loss have produced mixed results. Human studies are limited, though there is some evidence that, in combination with other herbs,

damiana may help improve

female sexual function. Much more research is needed to confirm its effectiveness.

Dietary supplement makers are not required by the U.S. government to demonstrate that their products are safe or effective. Ask your healthcare provider for advice on selecting a brand.

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-- Elena Conis