Fake. Negative ions exist in many places in life, such as the air. The use of negative ions to treat diseases in medicine is strictly regulated. There are strict requirements on the concentration of liquid medicine, the release amount of negative ions and the release mode. This can't be judged by the naked eye, and it is difficult for ordinary people to identify it, but obviously, it is impossible to rule out systemic toxins by soaking feet alone. "In fact, there are toxins in the human body, but toxins are not all harmful. Quite a few toxins can promote the production of antitoxin. The human body can adjust itself to achieve balance without artificially increasing or decreasing toxins. " Liu Jiaoshou said that the real toxins in the human body are generally caused by external factors, such as tetanus and plague, and the diseases caused by toxins are fatal, so it is impossible to eliminate toxins by machines. The interior of the instrument is mainly caused by metal chemical reaction. Try not to put your feet down, just click and the color will change.