Final answer:
About 50% of the lipids in foods and in the human body are triglycerides.
Step-by-step explanation:
Lipids, commonly called fats, are organic compounds made up mainly of fatty acids. In both foods and the human body, the most common type of lipid is triglycerides, which consists of a glycerol molecule bound to three fatty acid chains. Triglycerides are abundant in body tissues and are used for energy. Therefore, about 50% of the lipids in foods and in the human body are triglycerides.