Human Intestinal Flora Varies Around the Globe
Posted in Health, Science on April 22nd, 2008 by Chip GibbonsI recently wrote about how to make your own yogurt.
Urinalysis of populations from several different countries showed there are wide variations in metabolism based on the types of microbes that reside in the gut. What is particularly mind-boggling is the amount of bacteria we all having living in our intestines.
Each country turned out very different, metabolically.
“For instance, Chinese and Japanese people are almost identical genetically, which isn’t surprising, since they diverged culturally only a few thousand years ago - but they are very different metabolically,” said researcher Jeremy Nicholson, a biological chemist at Imperial College London.
“We know there’s a huge difference in the diseases that different nations risk - broadly speaking, the Japanese tend to die of strokes, the Chinese of heart attacks - and we see those differences reflected in their urine,” he added. “Of course they’re different in terms of lifestyle - the Japanese tend to eat more fish than the Chinese as a whole do - but their gut bacteria are also very distinct as well.”
Gut microbes help us get energy from our food.
“In your guts, you have about 1.5 kilograms (3.3 pounds) of 1,000 different species of bacteria,” Nicholson explained. “If you include all the genes from bacteria along with your own, only about 1 to 2 percent of the genes in your body are human, with the rest from the gut microbes. And what bacteria you have can be quite different from person to person.”
Next time you want to thank somebody for being alive, you might want to start with the bacteria of the world.