Vitamin A is necessary material all maintain healthy epithelial tissue needs, including eyes, respiratory, digestive group, urinary and reproductive systems, the most significant impact epithelium. Vitamin A deficiency, epithelial drying, proliferation and solution-oriented.
vitaminA is also known as retinol (retinal its aldehyde derivatives) ,it is a ring of unsaturated esters of monohydric alcohols, including vitamins A1, A2.
Vitamin A is yellow crystals; it is soluble in fats and fat solvents, insoluble in water. Natural Vitamin A exists only in animals. Flora of vitamin A which often exists in the form of fat, vitamin A acetate esters and ester soft fat often used in medical and nutrition.
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