Dr Saurabh Sethi, a gastroenterologist trained at AIIMS, Harvard, and Stanford Universities, shared 7 worst tea habits that can harm gut and liver. These are- having tea on empty stomach, having sweetened teas, detox that often contain laxatives, overdoing green tea extracts, consuming very hot tea, late-night tea/green tea and having boba/bubble tea, as starchy pearls contain hidden calories.