Experts say that for hair dyes, the public should use them as little as possible, and it is best not to use them. Don't dye your hair more than twice a year. When dyeing your hair, try to stay away from the roots and rinse it off as soon as possible, especially after perm.
So be sure to pay attention to the frequency and method of dyeing your hair. Don't dye your hair more than two or three times a year. Do not use hair dye that has been placed for more than half a year. It is best not to dye your hair during pregnancy or lactation.
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Related reports:
1. It is reported that Yale University in the United States conducted a survey on 1300 people, and found that the darker the hair color, the longer the duration, and the greater the chance of suffering from lymphoma. According to this study, if you use black hair dye for more than 25 years, the risk of lymphoma can be doubled.
In addition, a study in the scientific journal Materials found that smog after dyeing hair also increases the risk of cancer. According to reports, hair dye contains a harmful chemical-secondary amine.
Secondary amine can easily react with epoxy, aldehyde and acid gas, and can be used as dye fixing agent to stabilize the adhesion effect of dyes. It can penetrate into skin and hair to form nitrosamines, a strong carcinogenic chemical.
People who have never dyed their hair are really rare. But yesterday, a news in Weibo shocked the women who dyed their hair: a 60-year-old woman who had dyed her hair for 20 years suffered from a serious blood disease.
This news has attracted people's attention, especially in the winter and spring when we immediately enter the "peak season of dyeing and perm". The reporter learned that there have been similar cases in Nanjing, and the only suspicious factor that can be found is hair dyeing.
2. One day, the reporter randomly investigated 10 women who dyed their hair in Dongjiekou Scenic Resort Scenic Area, Fuzhou. Most women say they dye their hair just to look good. "Changing their hair style is like changing their mood." They know that dyeing hair is harmful to their hair quality, but they don't know that dyeing hair will be serious enough to cause cancer.
As for the hair dye, Miss Fan, 27, said that she didn't know what brand of hair dye the hairdresser gave her, only that it was expensive. Some packages are all in English, and she doesn't look at them carefully, so she depends on the hairdresser to fiddle with them.
However, she said that she should try to avoid dyeing her hair in the future. If you go to dye your hair, you will also look at the ingredient list of the hair dye first. Other interviewees said that it was not clear what brand of hair dye the hairdresser used for himself.
Experts suggest that if you need to dye your hair, don't dye it more than three times a year. Do not bake oil one week before dyeing, and do not wash your hair on the day of dyeing. If the scalp has a wound ulceration, it is not suitable for dyeing hair.
Hair dye should be a well-packaged and clearly marked product sold in regular shopping malls or barber shops, with production license, hygiene license, approval number of special cosmetics and product standard number.
Imported goods shall be marked with the sanitary approval number of imported cosmetics, the Chinese product name, the name and address of the manufacturer, the registered name and address of the distributor, etc. And reject fake and inferior products. If you want to go to a hairdresser's to dye your hair, you should choose a hairdresser who is legal, formal, reputable and qualified as a hairdresser.
References:
Public trust. Women suffer from severe blood diseases every two months.
Public trust. Young women have been dyeing their hair for 20 years. Skin cancer hair dye contains carcinogen benzene.