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Scientists warned that the intestinal bacteria contained in probiotic yogurt could develop in the stomach and become harmful.
Although these bacteria are known to be useful to our digestive system, thus improving health, a new study in mice has revealed that probiotic bacteria are devouring the protective layer of rodents' intestines, increasing the risk of irritable bowel syndrome.
The scientists said, according to "Russia Today": the probiotic grows faster in the unhealthy stomach and acts against them instead of improving them.
Researchers at the Washington University School of Medicine in St. Louis, led by Dr. Gautam Dantas, studied a bacterium called E. coli Nissle 1917, which had long been used to treat diarrhea, especially in children, after their discovery.
The researchers presented rats with different intestinal microbes, healthy and unhealthy, with a totally free microbial group.
Experimental rats received probiotics and various diets, including lipids, sugars and diets high in fiber. After 5 weeks, the researchers studied the bacteria in the gut of the mice and analyzed the DNA of the microbes.
Healthy mice exposed to probiotics have not seen many changes in their intestines: the bacterial component can grow and develop in unhealthy intestines.
The results suggest that probiotics may be beneficial for someone and harmful for another.
It is important to note that microbial development is not ongoing and that the study does not mean that probiotic-based treatments are not needed, but encourages their subsequent study to understand how they evolve and under what circumstances.
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