Before doing research and writing papers, I consulted the domestic and foreign literature. Judging from the search results, I personally think that there is no connection between hair dyeing and malignant blood diseases such as leukemia, at least the relationship between them is not statistically significant.

Originally, I wanted to post these contents and my conclusions on the forum, but I saw some netizens posting similar posts. The moderator said that most of these studies are based on regular hair dyeing products, and the problems with foreign regular products will not be too big, because experiments of carcinogenicity, teratogenicity and mutagenicity must be done in the research and development process. But the quality of so-called hair dyeing products in China is only God knows.