Ginger – helpful for upset stomach, nausea and motion sickness. Available as a tea (look for medicinal brands), or try candied ginger when you’re on the go. Probiotics – live bacteria and yeasts that are good for your digestive system. Probiotics can help with diarrhea caused by infections or related to antibiotic use. Available as supplements and in foods like yogurt, miso paste, kombucha, kimchi and raw sauerkraut.