大豆异黄酮是豆科植物的重要成分(非营养素成分),近年来研究显示其具有抗肿瘤、预防肿瘤作用,尤其对人类乳腺癌细胞株及前列腺癌细胞株均具有明显的体外抗肿瘤作用。流行病学调查表明,西方发达国家居民的乳腺癌、前列腺癌和直肠癌发病率显著高于发展中国家,肿瘤发生率与居民豆制品摄入量呈负相关。 Soybean isoflavones is an important component of legumes (non-nutrients), in recent years, studies have shown that it has anti-tumor and prevent the tumor effect, especially on human breast cancer cell lines and prostate cancer cell lines have significant anti-tumor effect in vitro. Epidemiological survey shows that the incidence of breast cancer, prostate cancer and rectal cancer among residents in western developed countries is significantly higher than that in developing countries. The incidence of cancer is negatively correlated with the intake of soy products by residents.