Fat, protein and carbohydrate, although there are some others such as alcohol and glycerol that do not come into these categories that can provide energy.
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carbohydrates, fats and oils, proteins are the energy giving nutrients minerals, water, vitamins are the non-energy giving nutrients
Proteins (roughly 4 calories per gram)
Fats (9 calories per gram)
carbohydrates (4 calories per gram)
Energy-containing nutrients are called vitamins. Vitamins are needed for good health. The RDA (Recommended Daily Acquirement) is the amount of vitamins the body needs every day.