There are 4 Calories in a gram of protein, 4 calories in a gram or carbohydrates and 9 calories in a gram of fat. Protein is the last source of energy the body uses (otherwise you would be losing muscle). Fat is obviously the hardest to burn because it is only used once the carbs are used up, and fat contains more than 2x the calories per gram.
1 gram of protein = 4 calories.
Protein has 4 calories per gram.
1 gram of protein is equivalent to 4 calories.
4 calories in 1 gram of protein!
Protein contains 4 calories per gram.
Protein contains 4 calories per gram.
Protein provides 4 calories per gram.
4 calories
Protein provides 4 calories per gram in a diet.
4 calories
There are 4 calories per gram of protein.
Protein contains 4 calories per gram.