You probably already know that alcohol is nothing but empty calories, but you might not realize that drinking booze also irritates your gastrointestinal tract, which in the long term can damage your body’s ability to absorb nutrients, vitamins, and minerals from the foods you eat. Instead opt for a green tea nightcap, which seems to help metabolism thanks to a substance called EGCG (a type of catechin) and the small amount of caffeine it contains. “Studies show that the caffeine in tea may provide a small metabolism benefit for up to 24 hours,” explains Gorin. If you’re looking for more of a buzz try kombucha, which is fermented tea and sugar. It has naturally occurring alcohol along with a host of probiotics (aka healthy, metabolism-boosting bacteria).