Drinking basil tea after a meal may help digestion and alleviate gas, according to the Ohio State University Extension. It's also used to dispel constipation, stomach cramps, headaches and anxiety. In addition to supplying antioxidants, basil was found to be rich in calcium, potassium, magnesium, phosphorus and zinc, according to research published in the November 2007 "Journal of the Science of Food and Agriculture." The Thai researchers concluded that aromatic herbs are valuable sources of nutrients and minerals. Always consult your doctor about any medical condition, and before using basil or any other herb as a treatment