Overprescription of antibiotics is a huge concern across the world. A number of people look for alternatives to antibiotics when it comes to the treatment of various diseases and conditions because antibiotics have long been associated with a number of health risks. Various studies have shown that people taking antibiotics can develop resistance and experience gastrointestinal distress since antibiotics kill both bad and good bacteria in the gut. Here are some of the most dangerous side effects of antibiotics: They may increase the risk of obesity: A study has shown that antibiotics may alter the type and volume of gut