[The relationship between Mo, Cu in drinking water and endemic fluorosis]

Based on the investigation and analysis of 97 samples of drinking water from an endemic fluorosis area, and 32 samples from a non-endemic fluorosis area, the author suggested that the Mo, Cu content and the changes of their proportions should be considered an important factor in addition to the content of fluorine. In the area where the fluorine is above 2ppm, the higher the proportion of Mo, Cu and F in drinking water, the less serious the disease is. At the same time, it is found that a change in the proportion of Mo and Cu also influences this disease. The higher the proportion of Mo and Cu, the more diseases will occur.