1.
Define sunshine Vitamin?

Vitamin D is sometimes called the “sunshine vitamin” because it's produced in your skin in response to sunlight. It's a fat-soluble vitamin in a family of compounds that includes vitamins D-1, D-2, and D-3. Your body produces vitamin D naturally when it's directly exposed to sunlight.

Explanation:

Vitamin D is called the sunshine vitamin.

Explanation:

This is because in humans, a type of vitamin D comes from sun exposure.

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b - the respond is innate and varies over time.

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