Menthol 30 is a premixed insulin and menthol is a short-acting insulin. Menthol 30 is a mixture of 30% menthol insulin and 70% arginine menthol insulin. Mentholatum is a short-acting insulin with an onset time of about 10-20 minutes and a peak concentration of 1-3 hours; arginated mentholatum is a medium-acting insulin with an onset time of about 2-4 hours and a peak concentration of 4-10 hours. Mentholated insulin, on the other hand, is a purely short-acting formulation. Menthol 30 can be used to control fasting and postprandial blood glucose, usually twice a day, because it contains both short-acting and intermediate-acting insulin, while menthol insulin is primarily used to control postprandial blood glucose, usually three times a day. Menthol 30 is a premixed insulin with both short-acting and intermediate-acting components, and Menthol insulin is a short-acting insulin, both of which have the risk of causing serious adverse reactions such as hypoglycemia, and need to be used under the guidance of a professional doctor, and there are risks of using them blindly.