An alternative medicine recognized by National Institute of Health in US, probiotics are commonly used to prevent and treat certain illnesses and support general wellness. Antibiotics kill gut-friendly bacteria as well as the unfriendly bacteria and probiotics are widely used after antibiotics to offset its side effects. A research published in the Pediatric Infectious Disease Journal at April 2010 shows that probiotics reduce the severity of diarrhea and enhance immunity. It also increases bioavailabity of B vitamins, calcium, iron, zinc, copper, and others.