Vitamin A (Retinol)

Retinol, or Vitamin A, is fat soluble and is an antioxidant vitamin that is important in vision and bone growth.

Vitamin A can be found in milk, eggs, carrots and spinach.

Vitamin A deficiency

Vitamin deficiency is common in developing countries. There are about 250,000 to 500,000 children that goes blind each year due to the deficiency. Night blindness is one of the first signs of vitamin A deficiency, which later contributes to total blindness by depriving the cornea from moisture and thus damaging to the retina and cornea.

Vitamin A overdose

Excess vitamin A can be harmful and fatal. The body converts carotene into vitamin A as it is needed. High levels of carotene are not toxic as compared to the ester forms. The livers of the human body will not be able to take the high toxicity level and will cause death.

Excess intake of vitamin A may lead to osteoporosis.