Lipids use the triglycerides within their makeup to store energy for later use. In humans, this energy is stored within the cells that are known as fatty cells.
Lipids and carbohydrates work the same way inside of the body as they do when they are being ingested into the body. The easiest way for humans to understand how this works is to eat a meal that is high in healthy lipids, wait a few hours and see how they feel. On a different day, a meal that is high in carbohydrates should be eaten, and after a few hours, the feelings should be checked. Most people will notice that after eating the meal that is high in healthy lipids, they will stay satisfied for much longer. After a meal that is high in carbohydrates, they will feel full very quickly, but they will be hungry much sooner.
Lipids allow the energy to take its time in coming out due to triglycerides. The energy can be released at a steady rate. Carbohydrates excrete all of their energy at one time. While the lipids are slowly releasing energy that is being stored for the body, carbohydrates have already exhausted all of their energy stores, and they will not be able to help the body stay in a satisfied state the way that lipids do.