Final answer:
Vitamin D is a unique nutrient that functions both as a vitamin and a hormone in the body.
Explanation:
Vitamin D can be considered both a vitamin and a hormone due to its synthesis in the body and hormone-like functions. It is unique in this aspect among vitamins, being classified as a conditionally essential micronutrient that can also act as a hormone.
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https://brainly.com/question/42897690
