目前认为人类的癌症30%~50%与饮食有关。大量流行病学调查和实验研究均证实,多摄入蔬菜、水果和谷物等可预防人类慢性疾病如肿瘤的发生与发展[1-2];并认为蔬菜和水果中的植物多酚(polyphenol)是其人类健康效应的主要活性成分,其中类异戊二烯(isoprenoids)是其重要组成部分。β- At present, 30% ~ 50% of human cancers are thought to be related to diet. A large number of epidemiological investigations and experimental studies have confirmed that more intake of vegetables, fruits and grains can prevent human chronic diseases such as the occurrence and development of tumors [1-2]; and that vegetable and fruit polyphenol (polyphenol) Is the main active ingredient of its human health effects, of which isoprenoids are an important part. β-