Different types of lipids come from different sources and can be synthesized within the body or obtained through diet. The three main types of lipids are triglycerides, phospholipids, and steroids.

• Triglycerides, more commonly known as fats and oils, are found in fats derived from plant sources such as olives, avocados, nuts, and corn. They make up 95% of lipids in the diet. Oils are lipids that are liquid at room temperature, whereas fats are lipids that are solid at room temperature.
• Phospholipids are synthesized in the body and used to form the cell and organelle membranes in animals and plants. They are water-soluble and make up only 2% of dietary lipids. 
• Steroids are synthesized in cells within the body itself where they are primarily derived from cholesterol.