β-Sitosterol is one of several phytosterols (plant sterols) with chemical structures similar to that of cholesterol. Sitosterols are white, waxy powders with a characteristic odor. They are hydrophobic and soluble in alcohols.
is an important phytosterol found in plant food. Phytosterols help lower cholesterol levels and in clinical studies, has been shown to stop the growth of prostate cancer cells. It can help improve urine flow and reduce swelling of the prostate glands.