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Several studies have been conducted till date to find out the links between using hair dye and developing bladder cancer. The results are not same for all the studies. Some of them suggest that the risk of having bladder cancer increase only if the dye in question is a permanent hair dye and not dyes that are semi permanent and go away after a few washes.
In spite of not having any clear evidence about the association between bladder cancer and hair dyes, one cannot rule out the fact completely that using hair dyes increases one’s risk of developing bladder cancer.
The most realistic theory that suggests that hair dye may act the triggering factor for bladder cancer is: as you use hair dyes, you will absorb a small amount of the chemicals known as arylamines through your skin. Human body renders these chemicals harmless and the arylamines are eliminated through urine. However, on the way of elimination the arylamines will come in contact with your bladder. Some individuals possess inherited genes for controlling this entire procedure; these genes are often poor at processing the arylamines. This results in increased risk of developing bladder cancer if the person uses hair dye regularly for several years. However, this theory is still not proved with enough evidences.
Other than bladder cancer, a number of studies have also found links between hair dyes and cancer forms like breast cancer, lymphomas and leukemia.
If you require using hair dyes for hiding the natural whites of your hair and are worried to know the possibilities discussed above, you must reduce the frequency of using dyes. Using lighter shades and semi permanent hair dyes will also decrease the risk of getting bladder cancer. The only reassuring fact is that majority of the dyes marketed today are safe as in the year 2006, EU Commission has banned 22 harmful hair dye ingredients.
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