Triglycerides are blood lipids, and like cholesterol, when levels get too high, they can predispose people to coronary artery disease. Excessively high triglycerides are also called hypertriglyceridemia and elevated levels should be reduced to decrease the risk of heart attack and stroke. Your health care provider is your best ally when it comes to reducing your triglyceride levels. Getting a physical examination may help your doctor understand why your levels are elevated. In addition to obesity and alcohol consumption, high triglycerides can be related to medical conditions such as hypothyroidism. Treating hypothyroidism can frequently stabilize your triglyceride levels.