Guarana used as an ephedra substitute

Guarana is native to the Amazon, where it is chewed and drunk by the Guarani, Orinoco and other indigenous groups. The stimulating effects of the evergreen vine, sometimes called Brazilian cocoa or paullinia, come from its dark seeds, which are chock-full of caffeine. In the U.S., the plant has become an alternative to the recently banned ephedra and is increasingly common in weight-loss supplements and energy drinks.

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Uses: Guarana is taken to combat fatigue, reduce hunger and promote weight loss. Homeopaths sometimes recommend it to treat headaches.

Dose: Usually 200 to 400 milligrams taken over the course of a day. Guarana is available in capsules, in liquid extracts and as a tea. Some food items, such as mints and drinks, also contain the herb.

Precautions: Pregnant and nursing women should avoid guarana since high doses of caffeine can harm fetuses and newborns. People with heart disease, kidney disease, epilepsy or panic disorder may be prone to harmful side effects brought on by the herb’s stimulating and diuretic effects.

Research: A few studies suggest the herb may play a role in promoting short-term weight loss, but little is known about its long-term effectiveness. Recent animal studies indicate that the herb also may protect the gastrointestinal lining from infection and injury.

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