Energy production depends on metabolic pathway and ATP yield, with fats having the highest ATP yield with ketone bodies,followed by Carbohydrates then proteins.
Energy produced by one glucose molecule yields final ATP of 5-7 through glycolysis and 17-25 through citric cycle.
Proteins energy prooduction is considered to be more healthy because unlike fats and carbohydrates they are not stored but used up immediately by the body.
Total energy of the body is provided by carbohydrates proteins and fats. The carbohydrate and protein gives 4 calories/gram. The fat gives 9 calories/gram.
Our body gets energy from the food. The food consists of carbohydrates proteins and fats. Carbohydrate comprises of carbon, oxygen and hydrogen. The protein is known as building factor of the body.
The fat is the main source of energy for the body. When the fat burns it gives large amount of energy to the body to perform work.
