No, a health club falsely claimed that the old people used the principle of blackening after chemical reaction of electrolytic brine to expel toxins when washing their feet, and suggested that the old people buy the so-called detoxification oral liquid, saying that it can expel toxins after drinking, and its price is 10,000 yuan, and three tablets are a course of treatment. Fitness clubs have been using this method to cheat dozens of elderly people out of nearly one million yuan under the guise of washing their feet and detoxifying.