How much energy is contained in a gram of protein?
a. 2 kcal
b. 4 kcal
c. 8 kcal
d. 10kcal
Answer: b. 4 kcal
Protein contains 4 kcal of energy per gram. When choosing proteins for consumption, the total amount should be about 10-15% the daily food intake, or about 0.8g per pound of body weight.