加里福尼亚大学的尼古拉斯.P和艾林.K两博士,从乳癌预防检诊的1,481名女性之乳头采取细胞进行研究。结果发现,10人中有1人具有可能成为癌的异常细胞。从这些女性的便次情况可了解到,便次在每周两次以下者,有四分之一具有此种异常细胞。对于每日至少一次便次的女性,20人中仅有一人具有异常细胞。 Nicolas P. and Erin K. K, Ph.D., of the University of California, studied cells from 1,481 female nipples of the Breast Cancer Prevention Checkup. As a result, it was found that 1 out of 10 people had abnormal cells that may become cancerous. It can be learned from the secondary situation of these women that once in less than twice a week, one in four such abnormal cells are present. For women who have had at least one visit a day, only one out of 20 have abnormal cells.