癌肿的发生有其内在的和外在的原因，它是一个涉及癌基因激活和抑癌基因失活的多基因和多步骤过程。这个过程的发生绝大部分是由环境引起的。流行病学调查结果表明［１］，在诸多的环境因素中，除吸烟外，主要是膳食和营养因素。近年来的大量研究表明，小麦麸在预防乳腺癌... The occurrence of cancer has its own internal and external causes. It is a multi-gene and multi-step process involving activation of oncogenes and inactivation of tumor suppressor genes. The vast majority of this process is caused by the environment. Epidemiological survey results show that [1] among many environmental factors, except for smoking, are mainly dietary and nutritional factors. A large number of studies in recent years have shown that wheat bran is used to prevent breast cancer...