A triglyceride is a type of fat found in the body and in food. It is composed of three fatty acids attached to a glycerol molecule. Triglycerides are the most common form of fat in the body and serve as a major source of energy. They are stored in fat cells and released into the bloodstream when the body needs energy. High levels of triglycerides can be a health concern, as they are associated with an increased risk of heart disease and stroke. Factors that can raise triglyceride levels include obesity, excessive alcohol consumption, and a diet high in carbohydrates. Regular exercise and a balanced diet can help maintain healthy triglyceride levels.