It is harmless to ingest excess of most vitamins. However, some vitamins are toxic in large amounts. Vitamin A is a fat soluble vitamin which is only available in two forms. Pre-formed, which is found in animal tissue. The other is carotene, which can be converted into Vitamin A by animals .
Carotene is found in easily found in carrots as well as other vegetables .
Vitamin A is important to the growth and repair of body tissues and helps maintain a smooth, soft, and disease free skin. It also helps protect the mucus membranes of the mouth, nose, throat, and lungs which reduces the chance of infection. Another function is helping mucus membranes combat the effects of air pollutants. Vitamin A also protects the soft lining of all the digestive tract. Another function of vitamin A is to aid in the secretion of gastric juices.