维生素A是通过多因素来防治癌变的。在现在这个“谈癌色变”的时代,人们对于防癌治癌尤其关心,对维生素A的兴趣也日益增加。维生素A能防癌巳得到很多学者的承认,但用大量维生素A抵抗癌变的早期作用还存在着一个严重的问题,即大量维生素A有毒性,目前有关维生素A中毒的报道越来越多。Sporn等人 Vitamin A is controlled by multiple factors to prevent cancer. In the current era of “spotting cancer,” people are particularly concerned about cancer prevention and treatment, and their interest in vitamin A is also increasing. Vitamin A can be recognized by many scholars for its anti-cancer activity, but there is still a serious problem with the early role of large amounts of vitamin A in resisting canceration. That is, a large amount of vitamin A is toxic. There are more and more reports about vitamin A poisoning. Sporn et al.