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Saw Palmetto - Topic Overview

What is saw palmetto?

Saw palmetto is a type of palm tree that grows in the southeastern United States.

The berry of the saw palmetto plant contains a compound that may reduce the symptoms of benign prostatic hyperplasia (BPH), which is a noncancerous enlargement of the prostate gland. Symptoms of an enlarged prostate include dribbling after urination and getting up many times during the night to urinate.

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From the 1870s until 1950, saw palmetto was a common treatment for prostate and other urinary problems. After 1950, saw palmetto was no longer recognized as a drug in the United States. It is still used in Europe as a treatment for BPH and is approved by the German Commission E. The Commission E evaluates herbal treatments for their safety and efficacy (how well they work).

In the United States, saw palmetto is available as a dietary supplement.

Experts disagree on whether saw palmetto improves men's symptoms of BPH. Experts also don't clearly understand how saw palmetto may improve symptoms of BPH. It might stop the growth of the prostate or even make it smaller. This is how finasteride, a medicine commonly prescribed to treat BPH symptoms, works.

What is saw palmetto used for?

People use saw palmetto to treat the symptoms of an enlarged prostate (BPH).

Most studies show that taking saw palmetto doesn't help symptoms of BPH any more than taking a placebo.1

A review of studies done on saw palmetto showed that men who took saw palmetto had some improvement in nighttime urination. But when only the best studies were included in the review, men who took saw palmetto had no difference in symptoms, urine flow, or nighttime urination compared with men who took a placebo.2

In another study, men who took even higher doses of saw palmetto had no difference in BPH symptoms, urine flow, or nighttime urination compared with men who took a placebo.3

Is saw palmetto safe?

Few problems have been reported among men taking saw palmetto. But some men may experience stomach problems. Saw palmetto is less likely than finasteride to cause difficulty in getting an erection.

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