Do hair dyes cause cancer? I searched medical literature sites and the results are inconsistent with the rumors]
I often see some articles on the Internet that introduce the carcinogenic effects of hair dyes. One of the so-called popular science articles is often cited in a study that says: “Blye University and Environmental Health in the United States The Institute of the Chinese Academy of Sciences has conducted an in-depth study on whether hair dyes cause cancer. Before the start of the experiment, experts randomly selected 700 female volunteers, conducted a follow-up survey for many years, and divided them into two groups. One group often dyed their hair. , Another group of people did not dye their hair. After a five-year follow-up investigation, experts found that women who often dye their hair have a much higher risk of breast cancer and ovarian cancer, with a probability of about 34.5%. The odds of breast and ovarian cancer are only around 2% to 5.1%.” I searched carefully, rummaged through professional literature search websites, and found no relevant articles, and Bly University and the Institute of Environmental Health belong to different countries in different popular science articles, sometimes the United Kingdom , and sometimes American. This kind of popular science article is really a bit unreliable.
But do hair dyes cause cancer? The answer is yes. Searching the two keywords of hair dye and cancer from the American medical literature search system PUBMED, you can search for 16 articles, all of which are articles on the correlation between hair dye and various cancers. Different articles study Different tumors, including salivary gland cancer, lymphoma, skin cancer, etc., some articles do conclude that hair dyes do have a risk of causing tumors, and some articles show no such risk. Moreover, these articles were published before 2000, and they were rarely published after 2000. Whether it means that the process of hair dye has changed and the carcinogenicity has decreased is unknown.
