Dietary Supplement Dr. Michael Murray Formulated Purity & Potency Guaranteed Peppermint Oil Complex contains extracts of peppermint, oregano and caraway seed in an enteric-coated capsule. The enteric coating allows the formula to be released into the small intestine and colon instead of the stomach resulting in improved absorption & utilization by the body. All Natural Factors products are manufactured in accordance with the Government of Canada's Good Manufacturing Practices (GMP), among the highest standards in the world.