Nutrients found in cheese, butter, nuts, oils, and fat in marbled meat that produce heat and energy are called?

• A. Fats
• B. Vitamins
• C. Proteins
• D. Carbohydrates

Answer: (A)

Fats are the energy-dense macronutrient that provides heat and energy when metabolized. The foods listed—cheese, butter, nuts, oils, and the fat in marbled meat—are rich in fat, so fats are the primary source of calories these items contribute. Fats yield about 9 kilocalories per gram, far more than carbohydrates or proteins, which each provide about 4 kcal per gram. This high energy density explains why fats are the main reservoir of usable energy and heat in the body. Vitamins do not provide energy, and while carbohydrates and proteins can supply energy, the described foods are most strongly associated with fats as the energy-producing nutrient.