Article: What will they think of next? How about vitamin D fortified orange juice!

Vitamin D insufficiency is still extremely prevalent in regions of North America that experience long winters, during which sunlight intensity is quite low. Few foods contain vitamin D naturally, so the human body produces it through direct exposure to sunlight, which catalyzes a reaction in the skin that converts 7-dehydrocholesterol to cholecalciferol (vitamin D). Cholecalciferol enters the bloodstream and travels to the liver, where it is converted into 25-hydroxy cholecalciferol, five times more potent than cholecalciferol in terms of vitamin D activity. The 25-hydroxy cholecalciferol is the form of vitamin D measured in the blood to determine patients' vitamin D status.

However, it ...

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