1, first of all, the effect, foot patch is not a medicine, it can't cure diseases, its main function is similar to foot massage, it acts on the body by stimulating the acupoints and reflex zones of the foot, and it has no pharmacological effect, so it belongs to physiotherapy products at most, focusing on disease prevention.
2. In addition, foot stickers can't be judged only by black or not. Many counterfeiters take advantage of this. Everyone likes to make a fuss about superficial phenomena, so we must distinguish them carefully.
3. The general foot patch adopts the open market formula. Although there are many brands, they are basically the same. Only a few brands have a unique core formula, and the cost and effect are different from those of the general ones. Therefore, it is recommended to choose regular, cheap and not greedy.