Not just a breath freshener, this healthy herb can calm stomach pain, gas, and diarrhea, according to an international review study. "Peppermint tea in particular helps soothe indigestion symptoms caused by a bug or irritable bowel syndrome," says Eric Yarnell, assistant professor of botanical medicine at Bastyr University near Seattle. Strong tea is best.
Yarnell recommends steeping two peppermint tea bags in a cup of boiled water for 15 minutes, being sure to keep the brew covered so the essential oils don't evaporate. (You'll see a slight slick of oil on the surface.) Strong mints and even candy canes may help tame an upset stomach, too, as long as you don't have heartburn (peppermint doesn't stop acid backwash).