Vitamin Diet

A prolonged untreated deficiency of vitamin A can cause night blindness due to impaired production of rhodopsin.

When vitamin A is taken in high amounts then it can cause side effects or toxicity. Toxicity can occur when high doses are ingested (accidently), as high as 660,000 IU by adults and 330,000 IU by children. Although a high dose can not cause an irreversible damage to an adult or child, it can cause severe birth defects and be toxic to the growing fetus. So before starting any supplements for this vitamin it is suggested to consult a specialist for correct recommendation and guidance