The potential energy stored in lipids is 9 calories per gram
The potential energy stored in proteins is 4 calories per gram
The potential energy stored in carbohydrates is 4 calories per gram
This is how they are utilized by the body:
<span>Lipids are broken down into their most basic form, glycerolProteins are broken down into their most basic form, amino acidsCarbohydrates are broken down into their most basic form, sugars</span>
The body then utilizes sugars, amino acids and glycerols to build substances that are needed for its growth, maintenance, and activity.
The body looks for these molecules as a source of energy in this order:
1. Carbohydrates
2. Lipids
3. Proteins