Saw palmetto extract is a herbal supplement derived from the fruit of the saw palmetto plant (Serenoa repens). It contains several active compounds, including fatty acids and phytosterols, which have anti-inflammatory and anti-androgenic effects. Saw palmetto extract is commonly used as a natural remedy for a variety of conditions, including prostate enlargement (benign prostatic hyperplasia), urinary tract infections, hair loss, and low libido. While some research has suggested that saw palmetto extract may be effective in reducing symptoms of prostate enlargement.