Vitamin A product and the Carotenoids
Vitamin A product prevents night blindness and other eye problems, as well as some skin disorders, such as acne. It enhances immunity, may help to heal gastrointestinal ulcers, and is needed for the maintenance and repair of epithelial tissue, of which the skin and mucous membranes are composed.
Above all it is important in the formation of bones and teeth, aids in fat storage, and protects against colds, flu, and infections of the kidneys, bladder, lungs, and mucous membranes. However Vitamin A product acts as an antioxidant, helping to protect the cells against cancer and other diseases and is necessary for new cell growth. It guards against heart disease and stroke, and lowers cholesterol levels. People receiving radiation treatment for cervical cancer, prostate cancer, or colorectal cancer have benefited from taking oral vitamin A.
For example radiation-induced anal ulcers can be a problem with such treatment programs, and a vitamin A megadose (100,000 international units daily) significantly reduced symptoms in 88 percent of people undergoing such regimens. This important vitamin also slows the aging process. Certainly the body cannot utilize protein without vitamin A product. Vitamin A is a well-known wrinkle eliminator. Applied topically in the form of tretinoin (the active ingredient in Retin-A and Renova), vitamin A reduces fine lines in the skin and helps to fade age spots.
Therefore a deficiency of vitamin A product can cause dry hair and /or skin, dryness of the conjunctiva and cornea, poor growth, and/or night blindness. Moreover other possible results of vitamin A deficiency include abscesses in the ears and insomnia and fatigue; reproductive difficulties; sinusitis and pneumonia, and frequent colds and other respiratory infections; skin disorders, including acne; and weight loss.