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结肠癌的发生与食物中的脂肪有密切关系。脂肪能促使胆酸分泌,在结肠中浓缩为胆酸核经肠道细菌的脱氢作用,产生致癌性的环戊菲。作者对发病率不同的某些国家(乌干达、印度、日本、英国、南非班图人、南非白人、美国、苏格兰、香港等)及地区居民的粪便进行研究,以明确(1)粪便
The occurrence of colon cancer is closely related to the fat in food. Fat can promote the secretion of bile acids, concentrated in the colon as bile acid nucleus by the intestinal bacteria dehydrogenation, resulting in carcinogenic cyclopentaphenanthrene. The authors studied the faeces of residents of certain regions (Uganda, India, Japan, United Kingdom, South African White, South African, United States, Scotland, Hong Kong, etc.) and their residents with different incidences to identify (1)