Triglycerides are fats that are found in the bloodstream and can increase the risk of heart disease. There are several synonyms for the word triglycerides, such as triacylglycerols, triacylglycerides, and TAGs. These terms are often used interchangeably to refer to the same molecule. Triglycerides are made up of three fatty acid chains attached to a glycerol backbone, and they are stored in fat cells throughout the body. High triglyceride levels can be caused by poor diet, obesity, and lack of physical activity. It is important to keep triglyceride levels under control through lifestyle changes and medication if necessary, to maintain good heart health.