Does perming and dyeing hair really cause cancer? Multiple studies may give a consistent answer, listen to 5 suggestions before dyeing
Many people like to change their look every once in a while, dyeing, perming, straightening, softening... as the so-called "change hair, change mood". But do you really know the health risks behind this?
A new study suggests that women who regularly pull their hair may have an increased risk of uterine cancer.
1. The use of chemical hair straighteners may increase the risk of uterine cancer in women
A total of 378 participants were diagnosed with uterine cancer through a 10.9-year follow-up survey, according to a new study published in the Journal of the National Cancer Institute on October 17 this year.
The researchers found that the use of chemical hair straighteners was associated with an increased risk of uterine cancer in women, and that the more frequent the use of hair straighteners, the higher the cancer risk.
The risk of developing uterine cancer was 155% higher for those who used hair straighteners regularly than those who did not use hair straighteners;
The risk was also 20% higher if the hair straightener was used no more than 4 times.
This may be related to the chemical components of bisphenol A, parabens, formaldehyde, metals, etc. in hair straighteners. And the scalp damage caused by hair straighteners can also play a role in promoting.
As early as 2019, there were also related studies that pointed out the harm of straight hair dyes to the human body.
The study, from the National Institutes of Environmental Health, found that women who regularly used permanent hair dye and chemical straighteners for a year may have a higher risk of breast cancer than those who used hair dye less often.
2. Hair dyes are also dangerous
Walking on the street, you can see a lot of dyed hair, green and pink are also very common, but this kind of beauty may coexist with harm, did you know?
Modern hair dyes are mainly divided into direct semi-permanent hair dyes, oxidative permanent hair dyes and natural hair dyes. Among these hair dyes, oxidative permanent hair dyes are the most damaging to hair .
Hair dyes contain aromatic amine compounds such as p-aminobiphenyl, benzidine, and 2-naphthylamine, and relevant in vitro experiments have clarified the harmfulness of these substances. Although there is still a lack of human or animal experiments to confirm whether it is carcinogenic, the International Agency for Research on Cancer has classified hair dyes used by individuals as a category 3 carcinogen.
There are quite a few studies exploring the relationship between hair dye and cancer.
A study published in the British Medical Journal explored the association of permanent hair dye use with the risk of developing cancer and risk of death. The final results showed that the use of permanent hair dye by individuals was not associated with the risk of most cancers and death, but it was associated with an increased risk of some breast cancers, some basal cell cancers, and ovarian cancers.
For men, after a 28-year survey of 28,795 men in Finland, researchers at the National Cancer Institute found that men who used permanent hair dye had prostate cancer compared with men who did not use permanent hair dye. The risk of cancer is 77% higher.
Hair dyes have the potential to cause cancer . In addition, the health hazard of hair dyes is that the benzene compounds in hair dyes can penetrate into the scalp, which may dry and break the scalp, causing hair loss problems , and the benzene in hair dyes. Diamines can also easily cause skin allergies .
If you want a lighter color, most of them can't do without the operation of bleaching. The color developer used in color bleaching has a strong oxidizing ability. The longer the color bleaching time, the more irritation and damage it will bring, and the risk of hair loss and allergies will also increase.
3. If you want to dye your hair safely, listen to these suggestions first
Many people may panic when they see the above research, but in fact, more research is needed to further discover the mechanism of whether hair dyes cause cancer.
For most people, if you dye your hair two or three times a year, you don't have to worry too much about cancer, mainly because frequent hair dyeing is not recommended.
As for the choice of hair dyes, the country also has strict regulations. Among the 75 hair dyes that are currently allowed to be used, the concentration should be between 0.05% and 4%. Therefore, it is possible to dye hair, but it must be done well before dyeing. The following 5 things:
- Do not synchronize with dyeing and perming. You need to use potions when perming. Most of them contain oxidants and alkaline substances, which are easy to damage the scalp environment and damage the hair. If you continue to dye your hair at this time, the damage will undoubtedly be more serious.
2. In order to avoid the occurrence of allergies, you should undergo an allergy test before using the hair dye , that is, apply a small amount of hair dye on the back of the ear or the inside of the arm and observe for 72 hours. If there is no allergic reaction, it can be used.
It is not advisable to wash your hair two days before dyeing , because the oil secreted by the scalp when you do not wash your hair can not only protect the scalp from the damage of the hair dye, but also make the coloring more full.
To choose a qualified hair dye , it is best to have a "national makeup special character" approval on the package, especially before going to the barber shop to dye your hair, you should also carefully check the package of the hair dye, and pay attention to the pure plant hair dye. Advanced, just a gimmick.
Hair dyeing is not suitable for everyone , such as people with scalp or skin allergies, the elderly, pregnant women, children, patients with liver damage and patients with skin lesions, it is best not to dye hair.
Not only the young people love to dye their hair, but the elderly are also very keen on dyeing black hair. Everyone who loves beauty has it. It is also possible to dye their hair, but be careful not to do it so often, and choose a qualified hair dye, so as to reduce the size of the hair. damage to the body.
References:
[1] "Girls, stop dyeing and straightening your hair frequently! The study found that the risk of uterine cancer increased by 155%! ". Health Times. 2022-11-01
[2] "Does hair dye increase the risk of cancer? Harvard study: most do not, but these types of cancers are at increased risk". Health Press. 2020-09-04
[3] "Safety Guide for "Dyeing Hair" Before Years! Consumer Protection Committee reminds you to do 4 points". Life Times. 2022-01-23
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