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How can our skin absorb victims from sunlight

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What Makes Your Skin Absorb Vitamin D From the Sun?
Sometimes called the "sunshine vitamin," many people think of vitamin D as the nutrient they absorb from the sun. The sun rays themselves don’t actually contain any vitamin D; instead, skin that is penetrated by specific ultraviolet rays works to synthesize this energy into vitamin D, starting a process involving the liver and kidneys to create the essential hormone calcitriol.

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