An example of the energy function of a carbohydrate.

Carbohydrates perform an energetic function in the body. When carbohydrates are digested, they are converted to glucose. Glucose is the main source of energy for your body. Simple carbohydrates can provide a quick burst of energy, but complex carbohydrates will provide energy to your body for a longer period of time because they release sugar into your bloodstream faster. Fat and protein can also provide energy for your body, but carbohydrates provide maximum energy per gram.