What does vitamin A do in the human body ||Vitamin A Retinoil

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What does vitamin A do in the human body ||Vitamin A Retinoil
Vitamin A is a fat-soluble vitamin that is naturally present in many foods. Vitamin A is important for normal vision, the immune system, and reproduction. Vitamin A also helps the heart, lungs, kidneys, and other organs work properly. There are two different types of vitamin A.
The best sources of vitamin A are:
Cod liver oil.
Eggs.
Fortified breakfast cereals.
Fortified skim milk.
Orange and yellow vegetables and fruits.
Other sources of beta-carotene such as broccoli, spinach, and most dark green, leafy vegetables.