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Side Effects Of Saw Palmetto. 1  Gastrointestinal problems. 2  Headache and dizziness. 3  Sexual problems. 4  Rhinitis. 5  Increased bleeding. 6  Not safe during pregnancy.
Saw palmetto (Serenoa repens/Sabal serrulata) is a palm-like plant with berries. The berries were a staple food and medicine for the Native Americans of the southeastern United States.In the early 1900s, men used the berries to treat urinary tract problems, and even to increase sperm production and boost libido.oday, the primary use of saw palmetto is to treat benign prostatic hyperplasia (BPH), a non-cancerous enlargement of the prostate gland. Researchers aren't sure exactly how saw palmetto works. But it contains plant-based chemicals that may be effective for BPH.