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维生素A:可维持上皮细胞的正常分化,防止上皮癌变。国外有人通过实验证明,维生素A可改变致癌物的代谢,阻止它们转变成终致癌物。还有人认为,维生素A可增强动物的免疫反应,增强对肿瘤的抵抗力。含维生素A多的食物是各种动物肝脏、鱼肝油、鱼卵、全奶、奶油、禽蛋等;胡萝卜素在体内可转变为维生素A,含胡萝卜素多的食物是有色蔬菜,如菠菜、豌豆苗、首蓿、胡萝卜、辣椒及杏子、柿子等。维生素C:可增强机体对肿瘤的抵抗力。并可阻断胺与亚硝酸钠在体内合成亚硝胺,亚硝胺为致癌
Vitamin A: can maintain the normal differentiation of epithelial cells, prevent epithelial canceration. Some people abroad experimentally prove that vitamin A can change the metabolism of carcinogens, prevent them from turning into carcinogens. Some people think that vitamin A can enhance the immune response of animals and enhance the resistance of the tumor. More foods containing vitamin A is a variety of animal liver, cod liver oil, roe, whole milk, butter, eggs, etc .; carotene in the body can be converted to vitamin A, carotenoids and more foods are colored vegetables such as spinach, peas Miao, first crop, carrot, pepper and apricot, persimmon and so on. Vitamin C: can enhance the body’s resistance to tumors. And can block the synthesis of nitrosamines and nitrosamines nitrosamines in the body, nitrosamines carcinogenic