Diverticulosis
It is also interesting that the steady upward climb in the rate of diverticular disease was interrupted among the British during World War II, when refined-fiber products (such as sugar and white bread) were rationed and supplies of protein and dairy products were limited.
Similarly, diverticulosis increases among various regional or ethnic groups when they migrate from areas where high-fiber foods are customary to areas of low-fiber food consumption. Diverticulosis is less common, for example, among Japanese persons living in Japan than among ethnic Japanese living in Hawaii, and it is less prevalent among the latter group, in turn, than among Japanese-Americans on the US mainland.
Among vegetarians, whose diet is by definition high in fiber, the prevalence of zenker’s diverticulitis is lower than among nonvegetarians. Moreover, when rats and rabbits are fed a low-fiber diet, they develop shortened, narrowed colons with hypertrophied muscular coats; these presumably are the earliest sign of developing colonic diverticular disease.
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