Stuck in pur-gut-tory? Several factors can contribute to constipation, from certain supplements and vitamins to dehydration and lack of movement. But there can even be microscopic reasons for why you can’t go — specifically, the type of bacteria that’s living in your gut. When the balance of gut bacteria is disrupted, it can cause several issues, such as irritable bowel syndrome , bloating, diarrhea and constipation. Now researchers in Japan have identified two common bacteria that, when