China-Oel contains 100% pure essential oil of peppermint. It is extracted by steam distillation from the aerial and flowering parts of the plant and is subject to constant pharmaceutical control. The cooling effect during application results from the interaction of menthol with the skin's cold receptors. It is recommended to inhale 2 to 3 times a day, 3 or 4 drops and you can also apply two drops on the chest, 2 or 3 times a day. China-Oel for internal and external use is indicated only for adults over 18 years of age, inhalation also for adolescents over 12 years of age. Peppermint oil (internal use) should not be taken if you are allergic to peppermint oil and/or menthol or if you have liver disease, gastric acid deficiency, biliary inflammation, gallstones, or other bile conditions. China-Oel should be stored out of the reach of children, protected from light and at a temperature not exceeding 25C. In the original packaging, the content is protected from light.