Final answer:
Vitamin D is a fat-soluble vitamin essential for healthy bones that the body synthesizes through exposure to UV radiation.
Explanation:
Vitamin D is a fat-soluble vitamin that is produced in the skin upon exposure to UV radiation. It plays a crucial role in calcium absorption, necessary for maintaining healthy bones. The synthesis of vitamin D involves a process starting in the skin, then the liver, and finally the kidneys, ultimately leading to the active form of the vitamin.
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