Our expert says:
Research on this topic was contradictory for some time, but evidence is steadily mounting that use of some hair dyes can increase the risk of cancer slightly - especially bladder cancer, and certain other kinds like lymphoma. The risk seems to be greatest for people who use permanent hair dyes often (e.g. once every 4-6weeks) for many years. Also, the risk may be higher if you dyed your hair before around 1980, as hair dyes contained more toxins then than now.
It doesn't mean that you have to give up colouring your hair, but it's a good idea to cut down on how often you use permanent dyes, and switch to temporary and semi-permanent products.
The EU is in the process of banning a range of chemicals in hair dyes, so hopefully safer products will soon be on our shelves as well.
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