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bacterial infections are treated with antibiotics, the number and diversity of gut bacteria might decrease, potentially resulting in severe diarrhea and other gastrointestinal concerns. Although, based on the current human evidence, there is some concern about altering the initial gut bacteria composition while taking probiotics. Additionally, the study conclusively demonstrates that the gut microbiota is stabilized. Antibiotics are powerful against potentially fatal pathogenic bacteria but can alter gut microbiota’s structure and function.
Animal studies have also provided evidence that antibiotic use may alter the gut microbiota composition, which may have long-term consequences like a higher risk of obesity and allergies. Probiotic microorganisms may also affect human immune function, modify gut microbiota composition, inhibit the growth of pathogenic or bacteria, and maintain the integrity of the gut barrier. However, there has been hesitancy due to alarms that probiotics may permanently change gut microbiota composition.
https://pakobserver.net/probiotics-may-offset-gut-damage-caused-by-antibiotics/