Lipids include fatty acids, cholesterol, and phospholipids. One function of lipids in the body is to serve as an energy reserve, whereas others serve as components of cell structure. Yet other lipids act as hormones and signaling molecules. Thus, the role lipids play in the human body depends on their structure and chemical composition.
Lipids are both ingested and made, acting as hormones, transporters, and membranes. Read more about the functions of lipids in the human body.