Triglycerides are a type of fat, called lipid, that circulate in your blood. They are the most common type of fat in your body and store unused calories to provide your body with energy. Triglycerides are different from cholesterol, which is used to build cells and certain hormones. High levels of triglycerides in the blood, known as hypertriglyceridemia, can put you at a higher risk of heart and vascular (blood vessel) disease, including heart attack and stroke. High triglycerides tend to show up along with other problems, like high blood pressure, diabetes, obesity, high levels of "bad" LDL cholesterol, and low levels of "good" HDL cholesterol. Triglycerides can be one of the signs of metabolic syndrome, which increases the risk for having a heart attack or stroke. High triglycerides are often caused by habitual overeating, but can also be triggered by underlying conditions such as excessive alcohol consumption or unmanaged diabetes. A blood test called a lipid panel can reveal whether or not you have high triglycerides. To manage high triglyceride levels, lifestyle changes such as losing weight, exercising regularly, and avoiding sugary and refined foods can be effective. In some cases, medication may also be necessary.