- The important in human body is to make sure the energy ingested is adequate to meet the energy demands.
- The function of the energy in the body are :
Energy is provided by carbohydrates, fat, and protein that we take everyday. Different food that we take will provide different energy to the body. Energy is measured in unit of kilocalories (kcal) or kilojoules (kJ). One kilocalorie is equivalent to 4.18 kilojoules (4.18 kJ).
- Carbohydrates contain 4 kcal (16 kJ) per gram
- Protein contain 4 kcal (17 kJ) per gram
- Fat contain 9 kcal (37 kJ) per gram
- Alcohol contain 7 kcal (29 kJ) per gram