US scientists have discovered that "gut microbes" - bacteria that live in our digestive tract - could be powerful clues to the cause and treatment of obesity.
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This means that you could have two guys eating the same amount of food (i.e. consuming the same calories) each day, and doing the same amount of exercise (i.e. burning equal number of calories) but over the course of several years, one gradually gets fatter and the other stays the same. Why? Because the one who stays the same has more Bacteroidetes in his gut, extracting fewer calories from the same amount of food.
The poor guy who gets fatter has a more efficient calorie grabber in his gut, and the excess gets stored as fat - putting him at higher risk of eventually becoming obese. link
Ok, yeah, a way for obese people to lose, but if true, they could add this to the water supply every few years for a week or so to nutrition deprived areas around the world so that the same food goes further for those people.
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