As a girl who dyes my hair every two or three months, I’ve always known that the dye is slightly damaging to my hair but I never thought it was too harmful. Yet recently I’ve heard that hair dye could cause cancer, which would seem plausible considering the harsh chemicals in the product, but is it true?
A question like this though is very broad but the American Cancer Society explains the possible link between cancer and hair dye. The main hair dye that would be a concern would be permanent dye because it causes lasting chemical changes in the hair shaft. This is the most popular of the hair dyes since it lasts the longest. You can be exposed to hair dyes if you dye your hair but the ones with the most exposure are hairdressers. Some studies have fed lab animals large amounts of the dyes over a long period time. These studies fond that the chemicals in the hair dyes, specifically certain aromatic amines, caused cancer in the animals. Yet they did not find a link between the dyes application to skin and cancer. When studying people, multiple observational studies focus on the risk of bladder cancer, breast cancer, and leukemia. The majority of studies who focused on hairdressers or other people exposed to dyes at work, reported a fairly consistent higher risk of bladder cancer. Yet they found no increase risk for those who only are exposed if they dye their hair.
Although the studies so far have not found a very strong relationship between hair dye and cancer, more research needs to be done to determine if hair dye might increase your risk for cancer after long term use. As of right now though there does not seem to be enough evidence to alter your hair dye usage.