What is vitiam A needed for?

so that you don't get unhalthy

so that you don't get unhalthy

Vitamin A promotes good vision, especially in low light. It is also called Retinol because it produces the pigments in the retina of the eye. Shortage of these pigments leads to worsening of vision, especially in low light. Vitamin A also helps to form and maintain healthy teeth, skeletal and soft tissue, mucous membranes, and skin. It may also be needed for reproduction and breast-feeding.

Vitamin A (Retinol) is found in animal liver, whole milk, and some fortified foods. There is also a so called provitamin form of it, beta-carotene, which is changed into Retinol (Vitamin A itself) when it gets into the human body. There is plenty of beta-carotene in carrots. You only have to keep in mind that beta-carotene is only soluble in fat. So, eating "pure" carrots will not result in more Retinol for you. You have to put carrots into some oily salads, or eat them with some bread and butter.

Beware that more and more Vitamin A does not mean more and more health. Excessive amounts of anything (including vitamins) can make you ill, too.