12 Science-Backed Benefits of Peppermint Tea and Extracts 1. May ease digestive issues Peppermint may relieve digestive symptoms, such as gas, bloating, and indigestion. Animal studies indicate that peppermint relaxes your digestive system and may ease pain. It also prevents smooth muscles from contracting, which could relieve spasms in your gut. 2. May help relieve tension headaches and migraines As peppermint acts as a muscle relaxant and pain reliever, it may diminish certain types of headach