For beauty loving girls, do they often like to change their hairstyles or colors? Hair dyeing can make you look more beautiful, but there is a great security threat. Japanese hair dye causes cancer. Daiso, a Japanese retailer of 100 yuan stores, has recalled three hair dye products on its shelves in Singapore as a precaution, and in Japanese media reports they contain excessive formaldehyde.
However, a spokesman for the Department of Health Sciences (HSA) told the Straits Times on Tuesday (April 17) that formaldehyde concentrations in the affected products sold here - everbilena hair touch a black, B dark brown and C Brown - are within the allowable limits.
These hair dye products come in the form of pens that can be applied to hair to immediately change color.
The Japanese broadcaster NHK reported that these were produced by sunpalko, the Kyoto cosmetics company, at its Taiwan plant.
Sunpalko said in a statement on its website that it had voluntarily recalled the product because it found formaldehyde levels did not meet the national cosmetics standards.
'in Singapore, formaldehyde can be used as a cosmetic preservative to prevent the growth of microorganisms in the product, with a concentration of no more than 0.2%. "A spokesman for HSA said.
"This restriction is set out in accordance with the ASEAN Cosmetics Directive and complies with the EU cosmetics regulations. '
However, the recall initiated by local importer Daiso industries is a precaution and HSA said it is currently monitoring to ensure that affected products are withdrawn from the market.
The spokesman said in a statement that formaldehyde may cause skin irritation to some people. Therefore, it is recommended that people who use hair dye read the instructions and avoid products that may be sensitive or allergic.
Although specialized studies of animal and human exposure through formaldehyde inhalation have now shown that chemicals can cause cancer, the spokesman added that the carcinogenic effect of local application has not been determined.
To date, HSA has not received any reports of adverse effects on users of these products.
The authorities indicated that they would continue to monitor the situation and take all appropriate action to protect public health and safety.
It is reported that the product has been sold in large quantities in Japan since 2012, and the recall scale reached about 2 million.
The head of the public relations department of daichuang said that none of the products involved in the recall were sold in China. At present, Chinese consumers who have purchased relevant goods in Japan are unable to complete the return procedures in China and need to send the goods back to Japan.
The company involved in the recall now has overseas stores in 26 countries and regions around the world, with an annual sales volume of 420 billion yen, or about 24.5 billion yuan.
Extended reading: can the hair dye we usually use cause cancer?
Since 1980s, a lot of researches have been carried out on the carcinogenicity of hair dye. The results show that the bacteria will change when they contact with hair dye and hydrogen peroxide, but there is no carcinogenicity after they are applied to animals. At the same time, it was widely investigated the statistics of the exposure of human population and the incidence of tumor after the use of hair dye, and it was not found that hair dye would lead to the increase of the incidence of tumor.
Therefore, IARC classifies the carcinogenicity of hair dye into grade 3, which is the same grade as coffee that people often drink.
It's a misunderstanding that hair dyeing causes cancer. For example, hair dye is a suspect, and investigators have conducted a long-term and full investigation. As a result, human evidence and physical evidence can not prove the crime, but it has a bad reputation of being investigated.
You can rest assured, my friends. However, it's still dangerous not to know the right way to open your hair. So beauty you must know the following ways, it can help you to minimize the harm of hair dyeing!
Skin test before hair dyeing
Before hair dyeing, the hair dye should be applied to the delicate skin behind the ear or inside the arm. Observe for 2-4 days. If there is no erythema, papule, blister and other allergic reactions, then dye again.
Do not mix hair dye
Do not mix different brands of hair dyes to avoid unnecessary chemical reactions and toxic and harmful substances.
Don't dye your hair too often
People who have dyed their hair in 3 months should not dye their hair again. Because the decolorizer in the hair dye has certain damage to the hair scale, the damaged hair scale will become fragile and easy to break. If the hair is dyed repeatedly within 3 months, the damaged scales will be damaged again before recovery. A long time will affect the hair quality.
There's no need to dye all the time
Many middle-aged and old people's hair roots turn white soon after dyeing. At this time, it is recommended to dye only the newly grown white hair; for people with partial gray hair, just dye the white part black.
Don't trust natural products
Light color or fast fading hair dye can be selected, and the content of p-phenylenediamine is less. Young people need less bright colors. Most middle-aged and old people choose to dye their white hair into black hair, so other precautions should be strictly observed. As the current pure natural hair dye is difficult to dye black, we should not believe it.