To keep your heart healthy, you may need to watch your triglyceride levels . Use these WebMD tips to learn how to lower triglycerides naturally For adults, a normal triglyceride level is under 150 mg/dL . Levels between 150–199 mg/dL are borderline high, and over 200 mg/dL are high. Very high triglycerides (over 500 mg/dL in adults) are dangerous and increase the risk of pancreatitis and other serious health issues. Learn what triglycerides are, early symptoms of high levels , causes, and effective treatment options. Find out how to manage triglycerides naturally and medically. Discover what serum triglycerides are, the health risks of high levels , and how to manage them through diet and lifestyle changes.