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We are not what we eat when it comes to gut bacteria

When it comes to gut bacteria, we are not what we eat. The types of gut bacteria that populate the guts of primates depend on the species of the host as well as where the host lives and what they eat, says a new study.

The study led by Howard Ochman at Yale University examines the gut microbial communities in great apes, showing that a host's species, rather than their diet, has the greatest effect on gut bacteria diversity.

"Bacteria are crucial to human health. They enhance the immune system, protect against toxins, and assist in the maturation and renewal of intestinal cells," says Ochman.

Gut microbes outnumber our own cells by 10 to 1 but little is known about how certain species come to populate our stomachs, which are sterile at birth. What causes this variation within microbial communities has been a matter of debate. Some scientists have argued that diet and habitat play the most prominent roles.

However, Ochman and colleagues found that diversity in the composition of these gut communities, not including those occasional transients and unwelcome visitors such as pathogenic bacteria, depends primarily upon the host species.
 
 

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