Which nutrient can be used as energy but is not the best source because it is needed for essential functions?

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Prepare for the WJEC Food Science and Nutrition Level 3 Test. Use multiple choice questions with instant feedback for effective study. Be confident and ready for the exam!

Multiple Choice

Which nutrient can be used as energy but is not the best source because it is needed for essential functions?

Explanation:
Protein can be used for energy, but its main job is to provide amino acids for growth, tissue repair, and the production of enzymes and hormones. Because these functions are essential, protein is not the best energy source—carbohydrates and fats are preferred for providing calories while preserving protein for their critical roles. Using protein for energy only occurs when other sources are insufficient, which can compromise growth, repair, and metabolic processes.

Protein can be used for energy, but its main job is to provide amino acids for growth, tissue repair, and the production of enzymes and hormones. Because these functions are essential, protein is not the best energy source—carbohydrates and fats are preferred for providing calories while preserving protein for their critical roles. Using protein for energy only occurs when other sources are insufficient, which can compromise growth, repair, and metabolic processes.

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