What is the function of vitamin A?
Functions: Vitamin A is a fat-soluble vitamin that helps you see normally in the dark and promotes the growth and health of all body cells and tissues. It also protects against infection by keeping healthy the skin and tissues in the mouth, stomach, intestines and respiratory and uro-genital tract. Deficiency problems: Night blindness and other eye problems; dry, scaly skin, problems with reproduction, poor growth. Food sources: Liver, fish oil, eggs, milk fortified with vitamin A; red, yellow and orange fruits and vegetables, many dark-green, leafy vegetables. Excess amounts: Can lead to birth defects, headaches, vomiting, double vision, hair loss, bone abnormalities and liver damage. Vitamin A is an essential human nutrient. Vitamin A actually refers to a family of similarly shaped molecules: the retinoids. Its important part is the retinyl group, which can be found in several forms. In foods of animal origin, the major form of vitamin A is an ester, primarily retinyl palmitate, whic
