Holland & Barrett Oil of Peppermint capsules contain peppermint oil, which was first identified in a seventeenth-century English field of spearmint. This natural hybrid is valued for the fragrant oil derived from its leaves and flowering tops. Known for its digestive benefits, peppermint oil is classified as an antispasmodic, helping to relieve stomach cramps, bloating, and flatulence, particularly in individuals with irritable bowel syndrome (IBS). It works by relaxing the muscles in the bowel wall, easing discomfort, and calming stomach muscles while improving bile flow for fat digestion. This enhances the speed at which food moves through the stomach, providing relief from discomfort.