Do You Have a Vitamin A Deficiency?

By Dr. Mercola

Vitamin A is an important vitamin for healthy vision, immune system function, and cell growth. It works synergistically with a number of other vitamins and minerals, including vitamins D, K2, zinc, and magnesium, without which it cannot perform its functions.

“Vitamin A” actually refers to several different but related nutrients that can be divided up into two main categories:1,2

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