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Researchers have been trying to look for possible connections. Between hair dye and some cancers And while the World Health Organization's Cancer Research Agency has determined that exposure to hair dye at work may cause cancer. In conclusion, there are no warnings yet. About using hair dye at home Because there is no evidence that can be conclusive.
The latest study, published in the BMJ medical journal, looked at data from 117,200 nurses at Brigham and Women's Hospital in Boston, including details about their exposure to hair dye. Not everyone had cancer at the start of the study. And has been following these nurses for 36 years.
From this study The researchers found no increased risk of developing the most common cancer. Or dying from cancer Among women who said they had used permanent hair dye Compared with those who said they had never used such hair dye
Studies have also found that using home hair dye It did not increase the risk of cancer of the bladder, brain, colon, kidneys, lungs, blood, and immune system. Or cancer, which is the most common skin or breast
However, studies suggest that the use of permanent dyes It is associated with a slightly increased risk of non-fatal skin basal cell carcinoma. And this risk is higher among women with naturally light hair. It also has an increased risk of ovarian cancer. And three types of breast cancer from the use of permanent hair dye This risk increases with the accumulated amount of hair dye used. แอมเบท
The authors of the report say that permanent dyeing in darker shades may be associated with more intense hair dye ingredients. The most intense hair dye is permanent hair dye. It accounts for about 80% of all hair dyes in the US and Europe, but a higher proportion of those used in Asia.
The study found that in general Between 50% to 80% of women use hair dye and 10% of men use it, with men aged 40 and over in the US and Europe.
The researchers said The findings should help reassure concerns that permanent home dye use May be associated with a risk of cancer Or increasing deaths
However, this study was an observational study only. Therefore unable to specify cause and effect The researchers also highlight some of the limitations in the study. For example, the study participants did not have ethnic diversity. Most of them are white women in the United States. With European descent And there are other factors That are not used to measure results Such as using other products That could affect the outcome of the study.