Multiple choice

In which systems must vitamin D be transformed to get activated vitamin D?

  1. Skin, liver, and kidneys

  2. Skin only

  3. Liver and kidneys

  4. It's already activated
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A Correct answer
Explanation

Vitamin D synthesis begins in the skin via exposure to ultraviolet light, where a cholesterol precursor is converted to cholecalciferol. It is then transported to the liver and subsequently to the kidneys, where enzymatic reactions convert it into its active form, calcitriol.

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