Vitamin A is also called retinol (the aldehyde derivatives retinaldehyde) or anti dry eyes factor, it is a unsaturated monohydric alcohols with alicyclic, including animal food source vitamin A1 and A2, it is a kind of material with retinol biological activity.
Vitamin A has treat function to various diseases.
It can treat ulcer, benign breast tumor, flat wart, menorrhagia, prevent and treat dysplasia of premature infants, recurrent respiratory tract infection of children etc.