What is it? Holland & Barrett Oil of Peppermint capsules contain peppermint oil. Peppermint is one of the most popular herbs, that many find its effect to be soothing. Peppermint Oil contributes to digestive comfort. Contains Peppermint Oil Supports The Digestive System.What Are the Benefits of This Supplement? Peppermint was first discovered growing in an English field of spearmint in the seventeenth century. This natural hybrid was then cultivated for the fragrant oil found in its leaves and flowering tops. Peppermint Oil supports the digestive system and helps to eliminate digestive discomfort. Holland & Barrett International Limited, Barling Way, CV10 7RH, UK Holland & Barrett Limited, 45 Henry St, D01 E9X8, Ireland