Цитата:
A particularly compelling example of the importance of the gut microbiota to host metabolism is provided by comparing the nutritional status of germ-free (GF) and conventionally raised laboratory animals. Numerous investigators have demonstrated that conventionally raised animals require up to 30% less caloric intake to maintain their body weight [9]. This remarkable observation is not only surprising; it is also counterintuitive since one might reasonably expect that bacteria and their human host may compete for a limited supply of ingested nutrients.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3144392/
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Казалось бы, паразиты должны отнимать пищу, а наоборот, благодаря им ешь на целых 30% меньше калорий.