Black Hair Dye and Cancer - research findingsFrom
www.nyrnaturalnews.com/article/the-hair-dyecancer-connection/Note: more research has been conducted with women than men. But there are a couple studies below specifically with men. Note also that everyone's body burden level, immune systems, and cancer fighting system is different based on lifestyle, environment, genetics, and eating habits. Permanent hair dyes consist of a two components – colour and developer. The colour component usually contains a range of synthetic dyes and intermediates that such as ammonia, diaminobenzenes, phenylenediamines, resorcinol and phenols.
Harmful colours
Toxic ingredients like diaminotoulene, diaminoanisole were removed from hair dye products some 20 years ago. But a quick label scan of most hair dyes reveals that they contain chemicals, most commonly
phenylenediamines which are just as harmful. The type of phenylenediamine used depends on the end colour, thus:
•
para-phenylenediamine (black) • para-toluenediamine (brown)
• ortho-phenylenediamine (Brown)
• para-aminophenol (reddish brown)
• ortho-aminophenol (light brown)
Other hair dye ingredients have also proven carcinogenic in at least one animal species including: 4-chloro-m-phenylenediamine, 2,4-toluenediamine, 2-nitro-p-phenylenediamine and 4-amino-2-nitrophenol. Regulation varies, but some of these have now been banned in hair colourants in some countries. Coal tar dyes have been also found to cause cancer in laboratory animals, yet no warning is required for these either.
Hair colours also contain several penetration enhancers known the aid the absorption of other toxic chemicals into the bloodstream. These include can include propylene glycol, polyethylene glycol, fatty acids such as oleic, palmitic and lauric acid and isopropyl alcohol to name but a few.
Both human and animal studies show that the body rapidly absorbs the carcinogens and other chemicals in permanent and semi-permanent dyes through the skin during the more then 30 minutes that dyes remain on the scalp. So if you use permanent, semi-permanent, shampoo-in or temporary hair colours you are increasing your risk of developing cancer
An early Harvard study suggested that compared to women who had never dyed their hair, women who dyed their hair one to four times a year had a 70% increased risk for ovarian cancer. Women who used hair dye five times or more per year had twice the risk of developing ovarian cancer compared to women who never used hair dye.
www.ncbi.nlm.nih.gov/pubmed/8375924Evidence suggests, for example, that if you use hair dye you may be increasing your risk of non-Hodgkin’s lymphoma and multiple myeloma anywhere from two to four times over a non-user. Some researchers even believe that hair dyes may account for as many as 20% of all cases of NHL in women.
www.ncbi.nlm.nih.gov/pubmed/?term=int+j+natl+cancer+insti+1994+86+210Other data from the 1992 National Cancer Institute (NCI) found that women who used permanent hair dyes had a 50% higher risk for developing non-Hodgkin’s lymphoma and an 80% higher risk of multiple myeloma than non-users.
www.ncbi.nlm.nih.gov/pmc/articles/PMC1694062/In 2008 Yale researchers found that women who used hair dye 6-9 times a year were at 60% greater risk of developing lymphocytic leukaemia.
As a general rule, the darker the shade of the dye, this higher the risk of breast cancer; thus women who use black, dark brown or red dyes are at the greatest risk.
According to the National Cancer Institute hair dye use is responsible for a 90% increased risk of multiple myeloma among
men.
www.ncbi.nlm.nih.gov/pmc/articles/PMC1694533/This result echoed that of an earlier NCI study which showed that
men who had used hair dyes had a two-fold risk for non-Hodgkin’s lymphoma and almost double the risk of leukaemia.
www.ncbi.nlm.nih.gov/pubmed/3354743
