Vitamin A is a fat-soluble vitamin important to bone growth, vision, reproduction, cell differentiation and division, and immune system regulation. The vitamin also helps prevent infection by producing white blood cells and is important for healthy skin and mucous membranes, according to the Office of Dietary Supplements.
Vitamin A is referred to be a vitamin for growth and body repair. Healthy formation of bones, teeth, skin; maintenance of outer layer of many tissues and organs; promotes growth and vitality; essential in pregnancy and lactation; necessary for night vision; good for growth and repair of body tissues; good for health of hair and eyes, and also keeps your skin smooth.
Vitamin A works together with vitamins D, B, E, zinc, phosphorus and calcium. It also acts as an antioxidant, which may help protect against cancer and other diseases.
Men over age 65 - 15,000 IU per day
Women - Less than 10,000 IU (3000 mcg) per day
Hypervitaminosis:- A Too much of the beta-carotene form of vitamin A can cause skin to appear yellow, while too much of the retinol form of vitamin A can cause mild headaches, nausea, dizziness, abdominal pain and hair loss.