Triglycerides: Causes and Treatment Triglycerides are a type of fat found in the blood. They are made up of three fatty acids attached to a glycerol molecule. Triglycerides are the most common form of fat in the body and are the main form of fat stored in adipose tissue (fat cells). They are also found in the blood and are used as a source of energy for the body. Triglycerides play an important role in the body's metabolism, as they are used to store energy that can be used later when needed. When we eat more calories than we need, the body converts the excess calories into triglycerides and stores them in fat cells. When we need energy, such as during exercise, the body releases the stored triglycerides into the bloodstream to be used for energy. However, high levels of triglycerides in the blood can be a risk factor for heart disease. Elevated triglycerides can be caused by a variety of factors including a diet high in saturated and trans fats, obesity, alcohol consumption, and ...