Probiotics May Be Harmful, br According to Study Probiotics in yogurt, kimchi,br kefir and in supplements A new study published in the journal Cell contradicts the current br probiotic trend. The study found that probiotics br can hinder a person's br "gut microbiome" A person's "gut microbiome" — all of the micro-organisms that live in a person's gut — play a vital role in overall health. Probiotics are often taken along side antibiotics as a way of counteracting antibiotic side-effects. Eran Elinav, study lead author, br via 'The Guardian' Researchers also discovered that susceptibility to the effects of probiotics varies wildly depending on the individual. Eran Elinav, study lead author, br via 'The Guardian' Elinv added that with a "tailored approach br probiotics have greater chances to benefit health.