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Which of these major nutrients provides the most energy per gram?
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Protein
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Carbohydrate
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Fat
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Fat provides the most energy per gram compared to protein and carbohydrates. While protein and carbohydrates provide 4 calories per gram, fat provides 9 calories per gram. This is because fat molecules contain more carbon and hydrogen atoms, which can be broken down to release more energy during metabolism. Therefore, consuming foods high in fat can provide a higher energy yield compared to foods high in protein or carbohydrates.
