Antibiotics kill gut bacteria and this loss affects the brain, according to a new study. So why is that solutions-news? Well, there’s an easy way to protect your health: Only take antibiotics in very serious, life-threatening situations. Regular use of antibiotics for colds and minor infections has a very negative effect on the intestinal system, the first line of defense of our immune system. The research also shows that probiotics and exercise were the most effective treatment to reverse the side-effects relating to memory after receiving an antibiotic.