Nisin is an antibiotic that has been added to our food for a long time, but its effect on our gut bacteria has not been well studied until now. "Nisin can harm the balance of bacteria in our intestines and, as a result, harm the health of the intestine and the whole body," says Dr.
Dalit Driman Medina, a specialist in family medicine. The team of researchers created six nisin-like substances and tested their effect on both beneficial and harmful bacteria taken from the human gut.