mint: relaxes smooth muscle of the stomach and intestines, peppermint squelches pain, gas and constipation; it is rich in antioxidants, maganese, copper and vitamin C; peppermint tea is soothing when you have cold; peppermint oil spread on the forehead 3 times in 30 minutes can reduce tension headaches. But if you have GERD, avoid as it relaxes the muscles of the esophagus and could make your problems worse.