Can long-term hair dyeing cause cancer? Harvard University spent 36 years investigating 120,000 people and finally came to a conclusion
Lili is a college student, and she is a typical groupie after she just entered college. She is obsessed with Korean stars, and she always likes to follow the stars to learn how to dress and style.
Every time she sees a good-looking hair color, she always has to try it. In order to save money, she often buys hair dye from the Internet and dyes her hair at home. She is very happy to see the beautiful hair color effect.
However, after dyeing her hair some time ago, Lili began to develop a rash on her neck, accompanied by coughing and other symptoms, which lasted for a long time but did not improve. When she went to the hospital for an investigation, it turned out to be early lung cancer!
1. Does hair dye cause cancer? Research tells you the answer
For young people who love beauty, hair dyeing and makeup are all to make themselves more beautiful, to please themselves and others, but there are rumors that hair dyeing may cause cancer. Is this true?
A study by Harvard Medical School published in the "British Medical Journal" involved about 120,000 white women between the ages of 30 and 50. After 36 years of investigation and research found that:
Women who have used permanent hair dyes, compared with women who have not used such hair dyes, do not have a significantly increased risk of cancer, but there is a certain association with cancers such as breast and ovarian cancer .
According to the analysis of the researchers, there is no definite research to show that hair dyeing can cause cancer.
However, frequent hair dyeing is not conducive to hair health. Frequent hair dyeing may cause hair damage, hair loss, and may cause allergic reactions , so it is still necessary to be cautious about hair dyeing.
2. Will frequent hair loss cause hair loss?
The stress of life, aging and other factors will accelerate the occurrence of hair loss. For people who frequently dye and perm their hair, they may also face hair loss.
Frequent hair dyeing will increase the risk of hair loss. This is because some chemical components in hair dyes are very irritating, which will increase the inflammatory response of the scalp and hair follicles, resulting in atrophy of hair follicles, thereby increasing the risk of hair loss.
The following people are not suitable for hair dyeing, so we must be vigilant.
1. People with damaged skin
For people with damaged skin, once the hair dye accidentally enters the skin from the wound, it is likely to cause skin irritation and make the wound more serious.
2. Pregnant women and lactating women
It is recommended that pregnant and lactating women try to avoid hair dyeing, so as not to increase the risk of allergies and even endanger the health of the fetus.
3. People with sensitive scalp and skin
People with sensitive scalp and skin are not recommended to dye their hair frequently. The p-phenylenediamine in hair dye may increase the risk of allergies, dermatitis, itching and other adverse reactions.
4. The elderly, people with poor liver and kidney
These people have relatively poor detoxification ability. Once the chemical substances in the hair dye enter the human body, they are not easy to metabolize, which will increase the risk of disease.
3. Hair dyeing VS perm, which one is more harmful?
Both hair dyeing and perm are very common operations. Is hair dyeing or perm more harmful?
In contrast, hair dyeing is more harmful than perm.
The hazards of hair dyeing mainly come from hair dyes, which contain chemical substances such as p-phenylenediamine and hydrogen peroxide, which can stimulate hair, damage hair follicles, cause hair loss, and may also cause dry and frizzy hair.
Frequent exposure to hair dye may also increase the risk of cancer.
The harm of perm is related to the way of perm. Generally, perm affects hair quality. As long as the roots are not permed, it will not affect the health of hair follicles .
It is recommended that if you want to perm or dye your hair, you must first conduct a skin allergy test, and then perm or dye your hair if there is no abnormal allergic reaction. And you must take good care of your hair in general, but in order to protect the health of your hair, it is best to reduce the number of times you perm and dye your hair, preferably not more than twice a year.
For the time being, there is no clear research to prove that hair dyeing can cause cancer, but frequent hair dyeing is indeed related to breast cancer, ovarian cancer and other cancers. In addition, frequent hair dyeing may also lead to hair loss and frizzy hair. It is recommended to reduce the number of times of dyeing and perming hair as much as possible.
References:
[1] "Hair Dyeing Causes Cancer, Is It True?" ". Family Doctor Online. 2021-10-16
[2] "Hair Dyeing Causes Cancer? Still losing hair? This is not a legend! What should be more worrying is... ". Popular Science China. 2020-06-05
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