Archaeological evidence has shown that Peppermint is 'the world's oldest medicine' and is in use since time immemorial. Peppermint is rich in menthol content and is used to flavor tea confectionery ice cream chewing gum and toothpaste. Its oil contains menthone and menthyl esters. Peppermint is also used in shampoos and soaps which gives a cooling effect on the skin. Scientific studies have measured the useful effects of enteric-coated peppermint capsules for treating symptoms of irritable bowel syndrome (IBS) such as pain bloating gas and diarrhea.