Nowadays, hair coloring has become a very common thing, walking on the road, the hair of few people is the original hair color, most of them are formed through hair coloring, middle-aged and elderly people in order to make themselves look younger, cover white hair will choose to dye hair, and young people are in pursuit of fashion and personality, will dye hair colorful.
I believe that many people have more or less heard that frequent hair coloring will damage hair follicles, which in turn will affect physical health, and there is also a saying that "frequent hair coloring will cause cancer". If it is only to simply change the hair color and damage the health of the body, and eventually get cancer, it is really not worth the loss, then is there a scientific basis for this statement, is it true or false?
The principle of hair coloring
Chemical hair coloring: borrowing the ammonia or alkaline ingredients contained in the hair dye, the scale layer of the hair is opened, and the dye small molecules and the oxidant penetrate into the cortical layer of the hair together, and the oxidation condensation reaction occurs at the same time, the dye is oxidized into a macromolecular compound, and the flow in the cortex layer shows the desired color.
Plant hair coloring: Many people now call their hair products all-natural, pure plant-based, harmful to the scalp and hair follicles. The so-called plant hair dyeing is from some plants, for example, free fruit, nail grass, He Shou Wu and other substances extracted from flower stems and leaves for hair coloring, which is expensive and small, so real plant hair dyeing is not common.
Frequent "hair coloring" can cause cancer, is it true or false? The results of the study were published, which was really informative
A scientist in the United States once did such an experiment, selected 50,000 women of different ages and occupations, and conducted a follow-up survey for up to 5 years, during which they would strictly count the number of times they colored their hair and the dye they made and the frequency of hair dyeing.
Five years later, a survey result was calculated that nearly 10,000 women had breast cancer because of long-term hair coloring, and women who often colored their hair were as high as 28% risk of breast cancer than women who did not dye their hair, which showed that frequent hair coloring can greatly increase their chances of cancer.
Mainly because some chemical hair dyes contain pigments, heavy metals, and phenylenediamine, this chemical will continue to accumulate on the scalp, and then enter your body through the scalp hair follicles, increasing your risk of cancer.
In addition, when dyeing hair, you usually feel a strong fragrance, this pungent fragrance will enter your trachea and bronchi through the respiratory system, accelerating the degeneration of the brain nerves, so frequent sniffing of this atmosphere and hair coloring will increase the probability of your Alzheimer's disease.
How to reduce the damage caused by hair coloring to the body?
- Choose a regular, more expensive hair dye
The so-called penny a penny, this sentence has a certain truth, expensive is not necessarily good, but cheap must not be good, so when dyeing hair, through the price can be roughly compared with the quality of the hair dye, can not be greedy for a while, causing permanent damage to the body.
- Dye up to twice a year
Japan once did a trial, a person can dye their hair up to twice a year, each time to be more than three months apart, the frequency of hair dyeing is too high, in addition to making you look good, there is no benefit to the body.
- Wash more after washing
After the customer dyes his hair, the barber will tell you not to wash your hair for a few days, in order to avoid the hair dye remaining on the scalp for a long time, clogging pores, you can wash more and wash away more chemicals.
- Do not wash your hair before dyeing your hair
Do not wash your hair before hair coloring is for the good coloring of the hair dye, in fact, there is another important reason, because the oil secreted by the scalp can protect the scalp during the hair coloring process, reduce the damage of the hair dye to the scalp, and prevent toxic substances from invading the body.
- Don't color your hair too brightly and too deeply
In general, the content of phenylenediamine is higher in darker or brighter hair dyes, and phenylenediamine is the most carcinogenic substance in hair dyes, and the damage to the scalp is also greater.