Image: Bing Fang | Written by: Six Magic Mirrors | Editor-in-Charge: Peas
The footsteps of the New Year are near, close. As the saying goes, the new year has a new look. Many small partners have chosen this key node in the past year, "makeover" do hair, dye and perm care one-stop, and greet the new year with a gorgeous new look.
Someone goes to a barbershop, someone diysies at home. After all, household hair dye products are diverse, it is not troublesome to use, the small box not only has the necessary hair dye, but also a variety of bibs, hair combs, masks, gloves and other tools, eager to help you open a small barber shop at home.
But ah, the magic mirror must be here to say more, the incidence of allergies, irritation and other problems of hair dye is really quite a lot. Today we are going to talk about the safety of "baking oil hair".
According to an old data, in 2017, China's national cosmetics adverse reaction monitoring system received a total of 2688 adverse reactions/events of hair color cosmetics:
▲Image source: Illustrated policy
A little hair dye that is "amazingly powerful"? The patients who were treated by magic mirror in the hospital before, there were really serious "allergy" manifestations caused by hair dyeing, itchy erythema on the face and neck, and the entire edema of the face and neck, and they were discharged from the hospital for 2 weeks.
Brothers and sisters who love to shave their hair, hurry down and look down. In addition, don't forget to share it with mom and dad to see, the health hazards lurking in these daily hair dyeing supplies are really quite a lot.
What are the hair dyes on the market? What are the ingredients?
When it comes to hair dyeing, I have to mention the hair dye itself.
At present, according to the dye formulation and the length of adhesion time, it is generally divided into temporary, semi-permanent and permanent hair dyes. According to the raw materials used in hair dyes, they can be divided into inorganic hair dyes, synthetic hair dyes and plant hair dyes.
Temporary hair dye only stays on the surface of the hair, plays a temporary dyeing role, not firm, shampoo can be washed off, semi-permanent hair dye is generally not added to the oxidant, seeping into the cortical layer without oxidative polymerization reaction, generally maintained for half a month or a little longer, household diy products are mostly these two products; the permanent use of dye molecules is small, strong affinity, can resist the color loss brought about by multiple shampoos, the harm is relatively greater, the duration is generally one year, this is the commonly used type of barbershop.
According to the classification of raw materials, inorganic hair dye is mainly used for white hair dyeing black, and the composition contains lead, iron, copper and other metal compounds, which can act with sulfur in cysteine in hair to form black lead sulfide to dye hair black. These hair dyes have been banned in several countries due to their potential toxicity. China also has restrictions on the content of lead in hair color products.
Synthetic hair dyes are the most common, usually with hydrogen peroxide to destroy hair melanin, so that hair depigmentation, and then with p-phenylenediamine and other intermediate agents to attach various colors to the hair, p-phenylenediamine is a known source of sensitization, belongs to aromatic amine compounds, is the cause of hair color dermatitis.
In addition, in recent years, the so-called "pure natural plant extract ingredient hair dye" on the market has also emerged in an endless stream. Is this a powerhouse or a fake gimmick? Are "all-natural" products really reliable? The answer is obvious.
The safety of individual products has yet to be proven, and many so-called natural hair dyes still have chemical hair dye ingredients. Some all-natural hair dyes containing the ingredient "Henna Flower" have been banned from sale by national and local food and drug administrations.
▲Image source: Inspection Bureau of the State Food and Drug Administration
The "three noes" products of hair dyes and the manufacture and sale of counterfeits are problems that the Food and Drug Administration of various regions actively investigates and regulates.
How much do you know about the dangers of hair dyes?
Frequent, long-term, and large number of hair coloring, the harm to hair and even the body cannot be ignored.
People often complain that after dyeing their hair, the scalp is itchy, dandruff increases, and the "snow" is flying all over the sky when they are thrown away. Over time, the hair will have problems such as roughness, dry hair, and even frequent loss. A small number of people dye their hair not long after the scalp is erythematous and edematous.
The most common hazard of hair coloring is dry, rough, or even shedding hair. This is because the p-phenylenediamine and metal substances in the hair dye penetrate into the hair's important part, the fur skin, and the peroxidation reaction occurs, and the disulfide bonds that play a connecting role in the hair are broken, resulting in dryness, fracture and even shedding of the hair.
Some people also have hair coloring related dermatitis problems, mainly because p-phenylenediamine can cause erythema, itching, desquamation and even edema on the scalp of some people, p-phenylenediamine is a strong allergen, and 5% of hair dyeing people will have allergic reactions of varying degrees. Exposure to phenylenediamine in short periods of time and in large doses can also lead to acute poisoning with methemoglobinemia.
Therefore, China's current "Cosmetic Hygiene Code" stipulates that the maximum allowable concentration of p-phenylenediamine in hair dyes is 6%, while the EU is reduced to 2%.
▲Image source: soogif
As for the most feared side effects, whether hair dyes will cause cancer, there is still no conclusive conclusion.
The National Cancer Institute believes that some early hair dyeing products can cause cancer in animals due to the inclusion of some special aromatic amines, but after the US Food and Drug Administration regulatory rectification, the composition of the later hair dyeing products has been changed, and whether the modified ingredients are directly carcinogenic is still inconclusive.
Epidemiological surveys have shown that barbers have an increased chance of developing bladder cancer; however, many large-scale epidemiological surveys have not yielded consistent results in the association of hair dyes with cancer, especially non-Hodgkin lymphoma, leukemia, breast cancer, and bladder cancer. Some studies support a correlation, while others do not believe that hair dyes increase the risk of cancer. A follow-up survey of a large hair coloring population in the United States showed that hair dyeers have a 3.8 times higher risk of leukemia than non-hair dyeers.
▲ Image source: National Cancer Institute
Hair coloring harms so much,
What can be done to avoid it effectively?
Having said all that, the most effective way to avoid side effects/adverse reactions is not to dye your hair! Especially the elderly, children, women who are ready to become mothers or have become mothers, people who are prone to allergies or have a family history of tumors.
However, if hair coloring is inevitable, how can we effectively care for and prevent related hazards?
1. Select regular and legal channels to purchase hair color cosmetics, and view the product name, production enterprise name and address, net content, composition table, production date and shelf life (or production batch number and deadline use date), production license number, cosmetics approval document number/ filing number and other information.
2. Before use, you should read the product manual in detail, it is recommended to carry out skin testing, and the proportion of hair dye and oxidant should be strictly in accordance with the requirements of the instructions to ensure that each ingredient can be effectively neutralized.
3. If there have been adverse reactions to hair color cosmetics before, avoid using the same product again.
4. Skin test, the general test site is recommended for the skin behind the ear, take a small amount of uniformly mixed hair dye products for testing. When self-testing is difficult to determine, it is recommended to consult a professional medical institution.
5. When using, avoid broken skin, apply moisturizer or petroleum jelly to the face and hairline skin, wear gloves, ear tips and other protective measures, and the amount of hair dye should not be too much.
6. If the hair color product accidentally enters the eyes, it should be rinsed immediately with water.
7. After the color of the hair color is fixed for 2 days, remember to wash it many times and try not to let the hair dye remain on the scalp.
Magic Mirror knows that many uncles and aunts dye their hair frequently in order to cover their white hair; in order to change their hair color frequently, for economic and convenient reasons, many young girls will also be more inclined to dye their hair at home. Therefore, the magic mirror recommends that everyone help parents at home to check the pass, find ta to confirm the use of non-allergic hair dye cream, look for regular manufacturers of large brands of products, so as to meet the needs of parents or their own hair coloring, while relatively safe.
Of course, we must also pay more attention to ourselves, do not dye our hair unless necessary, the injury is small, and the injury is real. If today's article is enlightening and helpful to you, please don't forget to "like", so that parents and friends can know the harm of hair coloring, choose hair coloring products carefully, no matter when, good health is the most important.
I love the world.
bibliography
La Vecchia C, Tavani A. Epidemiological evidence of hair dyes and human risk of cancer[J]. European Journal of Cancer Prevention: Official Journal of the European Organization for Cancer Prevention (ECP), 1995, 4(1): 31-43.