An interesting study shows how modern life has also altered our physiological needs since the last millenniumDon't store avocado like this: it's dangerous
Ancient microbial species never seen before discovered in paleo-feces. An interesting study shows how modern life has also altered our physiological needs since the last millennium.
In the last century alone, the quality of life of human beings has changed considerably: they have started to enjoy a longer life expectancy and have also become (on average) taller and fatter. While physical evolution is obvious to all and clear to scientists, much less is known about the evolution of the human gut bacterial system.
To understand more about microbial communities, an international team of researchers looked at DNA found in the paleo-feces of prehistoric humans found in Utah and northern Mexico. The DNA preserved in these biological remains (dating back to 2.000 years ago) made it possible to reconstruct 498 medium / high quality microbial genomes. These traces were then compared with the DNA of 789 modern stool samples - half of these belonging to people who consume a typical diet of Western industrialized countries, the other half of people accustomed to consuming non-industrialized foods, but produced in natural way in the communities to which they belong.
(Read: These beneficial microbes developed by researchers are capable of repairing the Earth)
Compared to the 789 microbial samples present in the intestine of modern man, the microbes present in paleo-feces are more similar to those found in samples from non-industrialized countries - explain the scholars. - The functional profile of paleo-feces samples reveals a scarce abundance of antibiotic resistance and at the same time an enrichment of the mobile genetic elements related to intestinal microbes.
Selecting the vast difference between microbial populations, a bacterium known as Treponema succinifaciens was found in each of the eight ancient microbes:
In ancient cultures, the food that was eaten was very different from today and could support a more diverse collection of microbes - he explains. Aleksandar Kostic, author of the study. - But by moving into the industrialized world and more refined products, many nutrients have been lost that would have helped support a diverse microbiome.
Western diets that cause the gut microbiotic diversity of populations in industrialized countries to deteriorate are also associated with intestinal inflammation and other chronic health problems.
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