Hello, bamboo vinegar is the essence extracted from bamboo at high temperature, which has the efficacy of sterilization and beauty. Generally, it can be divided into food grade, cosmetic grade and industrial grade. People who use good foot patches and cosmetics are all food-grade or cosmetic-grade, which are easily absorbed by the skin, with little residue and strong effect. The bamboo foot patch acts on the soles of the feet, stimulates the acupoints on the soles of the feet, unblocks the blockage, promotes blood circulation and excretion, and makes people feel natural and comfortable with few problems. This is a physical function, it must be effective, otherwise no one will use it. I have worked in Foot Stickers for many years and have some experience. I hope I can help you.