After a small year, the year is getting closer and closer.
Many people start preparing to buy new clothes early and prepare for the New Year.
Of course, for many female friends, the least "New Year's three-piece set", perm hair dyeing is one of the must-haves.
Dyeing hair, perming hair, beauty is beautiful, but at the same time there are many concerns.
What is the difference between 200 and 2000 perm hair? Will it be carcinogenic? Will it lose hair? What the truth is, let's learn together today.
What is the difference between 200 and 2000 perm hair?
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I believe that many people will ask: is choosing more expensive perm hair less harmful to hair?
Pharmaceutical ingredients
Most of the more expensive hair dyes are mainly plant-based ingredients, which have less damage to hair texture, while cheaper ones are basically chemical components and have greater damage to hair.
The final effect
For many hair dyes, the control of color is higher, and the color and color are better. And the more expensive perm will make the effect and durability better.
The most important factor that determines the price point: experience and technology
In general, experienced hair stylists control the time of action of the dye and the dosage of the dye is also more precise, which plays a key role in the damage to the hair and the final effect.
In addition, the geographical location of barbershops, the level of urban consumption, and the positioning of barbershop consumer groups are also important factors affecting price points.
If the hair quality is poor and the economy is rich, you can choose to dye and perm more expensive, and if the hair stylist has enough experience, the people with good hair quality can also choose the general price.
However, no matter what the price point of dyeing, it will cause damage to the hair, it is best not to exceed 2 times a year.
Which is more harmful, perm or hair color?
There is also a more concern: can perm and hair color be done at the same time? Which is more harmful?
First of all, the conclusion: hair dyeing and perming can not be carried out at the same time, both have great damage to hair quality, should be separated by more than two weeks, and the harm of hair dyeing is greater than perm.
The harm of hair coloring to the human body mainly comes from hair dyes, and some light hair colors also need to be bleached first, which contains chemical components such as p-phenylenediamine and hydrogen peroxide. Hair dye in direct contact with the scalp may irritate the scalp, damage the health of the hair follicles and lead to hair loss. The oxidants and alkaline catalysts contained in bleach can damage the hair scales, causing damage to the hair texture and becoming dry and frizzy.
Hair dyes contain heavy metals, aniline, phenols and hydrogen peroxide and other carcinogens, so far, there is no clear conclusion about the carcinogenicity of hair dyes, but the trend conclusion is that hair dyes have potential carcinogenicity, and long-term frequent exposure may increase the risk of cancer.
A 2008 report by the International Center for Research on Cancer showed that occupational exposure to hair dyes could be carcinogenic, and related animal experiments showed that long-term use of hair dyes can lead to sperm malformations in mice.
The harm of perm is related to the way it is permed: only the ends of the hair are permed or from the root to the end of the hair.
Different ways have different hazards to hair. Hair grows out of the hair follicle is a hair shaft, and the hair shaft is actually a dead keratinocyte, itself does not consume nutrients, therefore, the perm only affects the hair quality of the ends, there is no harm to the scalp. If you want to perm the root, it may affect the health of the hair follicles, causing dandruff or hair loss.
In addition, the harm of dyeing and perming hair to hair also has a certain relationship with the hair stylist, such as the method of the agent, the amount of the agent and the residence time, etc. all need to be judged by the hair stylist, if the control is not good, the damage to the hair is much greater than normal use.
Which people don't recommend perming and dyeing their hair?
People with unhealthy scalp or hair
People with scalp injuries, boils, folliculitis and other skin lesions, a large number of hair loss and dry and bifurcated hair (including outdoor workers and those who have just recovered from severe illness) should not perm and dye their hair.
People with allergies
People with urticaria, eczema, allergic rhinitis and asthma and other diseases are best not to perm their hair, in addition, people who are allergic to the ingredients of the hair dye should not perm their hair.
Women during pregnancy and in the first half of the postpartum period
Women during pregnancy and postpartum have greater changes in the endocrine system, are prone to hair loss, fragile hair, cannot withstand the damage of perm dyes, and some chemicals are not conducive to fetal health, which may cause fetal development disorders or teratogenicity.
minor
Minors are in the growth and development period, dyeing and perming will affect the normal growth of hair, and children and adolescents are sensitive to heavy metals and chemical components in hair dyes, and it is not recommended to perm hair.
In addition, patients with high blood pressure and heart disease are not recommended to perm their hair.
What are the precautions for dyeing and perming hair?
About choosing a hair dye
Hair dyes with less toxicity and irritation should be selected as much as possible, such as plant-based hair dyes.
If you need to choose a synthetic hair dye, try to choose a product with a p-phenylenediamine content of less than 2% (6% of the p-phenylenediamine concentration is still easy to sensitize).
Choose qualified products with complete packaging, clear information printing, and relevant quality certification, such as the use of imported products, which must be marked in both Chinese and English.
Precautions before dyeing and perming
Skin allergy test
A small amount of hair dye or perm should be applied to the inside of the arm or behind the ear, and there is no abnormal reaction such as itching, pain or blisters within 48 hours, and then dye the hair.
Hair care
Start your hair care two weeks before dying and perming to ensure that your hair is in good condition when you dye it.
Do not wash your hair two days before dyeing your hair
The oil secreted by the hair protects the hair and scalp, and these oils and dust adsorbed on the hair strands do not affect the effect of hair coloring.
Choose a strand of hair for the perm test
The damage of different perms to hair texture varies from person to person, you can first test a strand of hair to see if the hair changes color, adhesions, hardening or breakage, if this phenomenon occurs, you can delay the perm or choose a milder perm.
Sum up
Whether it's hair coloring or perming
There are certain harms to the human body
If you can't dye it, you can't dye it
Or control the number and interval of dyeing
It is best not to do more than 2 times a year
The interval should not be too short
Take good care of your hair after dyeing
Repairs damaged hair
This article is reproduced from the WeChat public account "Popular Science China"
Expert of this article: Wang Wenxiang, professor of Fujian Medical University, doctoral supervisor