Needed for the health of the outer skin and the body¡'s inner lining.
Support the functioning of the respiratory and immune systems,
aids in the growth of teeth, hair, and eyes,
as well as the reproductive organs of women.

Problems of too little Vitamin A

The problem is known as Hypovitaminosis A.
It causes night blindness, damage tear secretion,
increased susceptibility to respiratory infections,
dry or rough skin, poor bone growth and weak tooth enamel,
  weight loss and diarrhea, and it can stunt growth in children.

Problems of too much Vitamin A

Taking large amounts over a long period may notice breaks in skin
at the corners of their mouth or some hair loss.
Since it is a fat-soluble vitamin stored in body fat,
it is usually necessary to consume it only in minute amounts.