Triacylglycerols, also known as triglycerides, are a type of fat found in the body and in food. They are composed of three fatty acid molecules attached to a glycerol backbone. Triacylglycerols serve as a major energy source and are stored in adipose tissue, providing insulation and protection for organs. When the body needs energy, it breaks down triacylglycerols into fatty acids and glycerol, which can then be used for fuel. High levels of triacylglycerols in the blood can be associated with health issues, such as cardiovascular disease and metabolic syndrome. Maintaining a balanced diet can help regulate their levels.