Question

multiple choice question
which protein is almost never broken down for fuel?

protein in the diet
collagen
muscle protein

Explanation:

To determine the protein almost never broken down for fuel, we analyze each option:

• Protein in the diet: Can be broken down for energy when needed.
• Collagen: It has a structural role (e.g., in skin, bones) and is not typically used for fuel as the body prioritizes other proteins for energy before collagen.
• Muscle protein: Can be broken down for fuel, especially in cases of energy deficit (e.g., starvation or extreme exercise without sufficient energy intake).

Answer:

B. Collagen