Recently.
A 60-year-old patient is being seen in a hospital in Nanjing.
Liver damage occurs after frequent hair dyeing for a long time.
The disease recurs in the middle.
Liver failure occurred at one point.
* It took more than two months to get better.
According to Chang Jiabao, chief physician of the Second Department of Hepatology of the Tangshan Branch of Nanjing Second Hospital, the patient's urine color was yellow, and he didn't pay attention to it. After visiting a local hospital, it was found that there may be liver damage.
The patient was subsequently transferred to Nanjing Second Hospital**. After further questioning the medical history, the doctor considered that the main cause of the disease was the patient's long-term frequent hair dyeing.
Once a month, sometimes twice, listening to the patient's introduction is a small place to cut hair, I think it may have a lot to do with hair dye, many hair dyes must go through various solvents, it is possible that benzene has more components, the toxicity is relatively strong, too often after the drug slowly penetrates into the human body through the surface of the blood vessels, absorbs and accumulates in the liver, causing liver damage for many years. Chang Jiabao introduced.
The patient's process is full of twists and turns. At first, jaundice rose rapidly, indicating liver failure, and after more than two months**, the patient's liver condition improved.
The doctor reminds that you must choose a formal institution for hair dyeing, and you must see the ingredients clearly when choosing hair dye, try to choose natural plant ingredients, and avoid hair dyes with more chemical ingredients, especially some hair dyes of unknown origin, which may contain phenylenediamine, heavy metals, etc., and should stay away.
If there are abnormal manifestations such as dark urine color and yellowing, you should stop using it immediately and seek medical attention in time, "I feel that I have no strength, my body is more itchy, I don't want to eat and I feel a little nauseous, as well as vomiting and oil aversion, which is an obvious symptom of patients with liver disease." ”
Dozens of pieces and hundreds of pieces of hair dye.
What's the difference?
There are various styles of hair dyes on the market, ranging from tens to hundreds, but the higher the price, the better?
Not really.
Hair dyes on the market can be broadly divided into four categories: plant-based hair dyes, metallic salt hair dyes, direct hair dyes, and permanent hair dyes.
Plant-based hair dye.
Plant-based hair dye is a new type of hair dye that is being researched and developed, and the main ingredients are natural plants or their extracts. However, it actually attaches the dyed molecules directly to the surface of the hair, which is difficult to last.
Metallic salt hair dyes.
The main raw material is lead acetate. The advantage is that the coloration is good and the color retention time is long. The disadvantage is that lead, as a harmful substance that can enter the human body, has been included in the list of prohibited substances in many countries.
Direct hair dye.
Direct hair dye can be divided into two types: temporary hair dye and semi-permanent hair dye.
Temporary hair dyes are so large that they do not penetrate into the hair fibers, and usually only temporarily adhere to the surface of the hair to achieve the coloring effect.
Unlike permanent hair dyes, semi-permanent hair dyes use dyes that pass through the surface of the hair and enter the hair without oxidation.
The advantage of direct hair dye is that it is safe and has little damage to the hair; The disadvantage is that the color is maintained for a short time.
Permanent (or oxidative) hair dye.
Permanent hair dyes are generally chemically synthesized and consist of intermediates, coupling agents and oxidizing agents, with the main components including: p-phenylenediamine and hydrogen peroxide.
Permanent hair dye mainly uses the oxidative polymerization reaction of p-phenylenediamine to produce macromolecular pigments, so as to achieve the effect of dyeing and fixing color. Permanent hair dyes are the most widely used hair dyes with a market share of around 80%.
When choosing a hair dye, pay attention to the ingredient list of the product. Many products on the market that claim to be plant-based hair dye often only add plant extracts to the hair dye and do not change the essence of their p-phenylenediamine and even some heavy metal ingredients. At the same time, some plant hair dyes add complex and diverse botanical ingredients, which can also increase the risk of allergies.
It is worth mentioning that some of the "one-wash black" products that are now mainly advertised to the elders are still essentially hair dyes.
These products can be more harmful than hair dyes:
First, many "one-wash black" products are not produced by regular big brands, and most of the self-proclaimed "one-wash black" products of shampoo have not obtained the approval number of special-purpose cosmetics ("national cosmetics special words"), and the product quality is worrying;
Second, these products often require a high frequency of use, and frequent use often increases the risk of allergies and physical damage.
How to dye my hair safely?
Although there is no definite positive correlation between hair dye and the incidence of cancer, some other harms of hair dye to the human body cannot be ignored. If you want to dye your hair safely, you still need to pay attention to the following:
Don't dye and perm your hair at the same time.
Hair dyes, especially permanent ones, can damage the texture of your hair during the coloring process, leaving it dry and frizzy. The potions used in perming often contain oxidants and alkaline substances, which are also very damaging to the hair quality. If you perm and dye at the same time, the damage to the hair will be multiplied. It is recommended to separate the perm from the hair coloring if time allows, giving the hair time to repair.
Do an allergy test before dyeing your hair.
Chemical ingredients such as hydrogen peroxide, chemical dyes, and coupled hair colorants contained in hair dyes, as well as botanical ingredients added to some hair dyes, are allergens that are prone to allergic reactions, and can easily cause scalp allergies during the hair dyeing process. Therefore, be sure to do an allergy test before dyeing your hair. The hair dye can be diluted with water and applied to the inside of the elbow or behind the ear within 48 to 72 hours before dyeing the hair to be observed for allergic reactions.
A brand of hair dye recommends that consumers do an allergy test before use. **A shopping**.
It is recommended not to wash your hair before dyeing your hair.
Because the oil secreted by the scalp not only protects the scalp from hair dyes, but also makes the hair more colored.
To choose a qualified hair dye.
China's "Regulations on the Hygiene Supervision of Cosmetics" clearly stipulates that hair dye products are one of the nine categories of special-purpose cosmetics, and the approval number of special-purpose cosmetics must be obtained before they can be produced and sold. When choosing hair dye, it is best to choose products produced by regular manufacturers, pay attention to whether there is a "national makeup special word" logo on the product packaging box, and do not be superstitious about plant hair dyes with big gimmicks.
Especially before going to the barber shop to dye your hair, remember to check the packaging of the hair dye with the barber to see if it is a legitimate product.
Use hair color products correctly according to the instructions.
When using hair color products, it is recommended to read the instructions carefully. Wear disposable gloves when using and avoid touching hair dye directly with your hands. It is not recommended to use hair dye when there is **damage to the head, neck and hands, and it is best to wait until the **barrier is repaired before dyeing the hair.
Don't dye your hair too often.
It is recommended to dye your hair at a time of more than 4 months.
*: Popular Science China.