... steroidal saponins, phytosterols, volatile oil, resin, tannins. Saw Palmetto berries contain an oil with a variety of fatty acids ... bronchial passages. Recent clinical trials have shown that saw palmetto berries are helpful in the treatment of benign prostatic hyperplasia ... toxicity reports associated with the use of saw palmetto berries. The oil in saw palmetto berries can easily go rancid, so store ...