Question

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adequate intake of this nutrient protects muscle mass and helps to ensure good health and quality of life in older adults. additionally, wounds, weight loss, and infection can increase the need for this nutrient. what nutrient is it?
protein
vitamins
water
minerals

Explanation:

Protein is essential for maintaining muscle mass. Older adults need adequate protein for good health. Also, during wound - healing, weight loss, and infection (which involve tissue repair and immune function), protein requirements increase. Vitamins, water, and minerals do not have the same direct role in muscle mass protection and the specific increased need in these conditions as protein does.

Answer:

Protein