"This one can be so tricky," she said. "We all feel good about ourselves for buying green tea. Again, it should only have one ingredient — green tea." But often, that's not the case. This is another instance in which checking labels is key. "Watch out for brands that have 'chicory' as an ingredient, because this is a natural sweetener. Additionally, if you are buying brands of green tea that are already prepared, there is also a high likelihood that it has some type of sugar or sugar substitute added, so be sure to check labels again for two words . . . green tea."