Americans have developed a laxative habit. Surging demand is contributing to a shortage of polyethylene glycol 3350, the generic name for laxatives like Miralax and Glycolax, gastroenterologists and suppliers say. Consumers are noticing emptier shelves in drugstores across the country as a result. - snip - Some people are treating laxatives like a budget Ozempic to feel skinnier, psychologists say. And social media, including TikTok’s popular #GutTok, spreads misinformation around what healthy bathroom behavior looks like, doctors say. Searches for laxative pills on Amazon have more than tripled in the past year, according to analytics company Pattern. Manufacturers of fiber...