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The People’s Daily and other names are the names of silicone oil in shampoo! Recently, a title on the Internet titled "3 "Shampoos" has been seized, and some of the family's cockroaches have been thrown early, beware of "cancer" stepping through the door! The news was maddened. The three carcinogenic shampoos specified in the article are not specific to the three brands, but shampoos containing dioxane, silicone oil and preservatives. Are these ingredients really carcinogenic? Is dioxane, silicone oil, and preservative really carcinogenic? In fact, many of the shampoos used in daily life contain these three ingredients. If they are so easy to cause cancer, they will not exist anymore. Dioxane According to the classification of carcinogens published by the International Agency for Research on Cancer, dioxane is a Class 2B carcinogen, which is a substance that may have carcinogenic effects on the human body, but it is only possible. Therefore, dioxane is far less terrible. China Food and Drug Administration has limited the content of dioxane in cosmetics to no more than 30ppm, very small amount, plus the skin's absorption rate of dioxane is very low, so even if the shampoo contains traces of dioxane, choose to go through the national quality Regular shampoo products are safe to check. Silicone oil In recent years, the concept of “silicone-free oil shampoo” has slowly gained popularity, but is silicone oil really bad? Actually it is not bad. There are many kinds of silicone oils, such as polydimethylsiloxane (PDMS), amino silicone oil, cyclomethicone, siloxane copolymer, etc. Among them, PDMS is the most common, the common name is dimethicone, which is hair care products and skin care products. The most common ingredient added, it is insoluble in water, about 2-10 microns in diameter, smaller than the diameter of the hair follicle. Under normal circumstances, it is not easy to clog the pores. Silicone oil has low adsorption, film formation and low surface tension. It is widely used in the pharmaceutical industry for assisted colonoscopy, and in the ophthalmology to inject the fundus to replace the aqueous humor. It is relatively non-toxic to the human body. In addition, the cause of cancer is very complicated, and the shampoo containing silicone oil is only externally washed and does not enter the human body. There is no conclusive evidence on the current carcinogenic view of silicone oil. preservative Common preservatives added to shampoos are methylisothiazolinone (MIT) and methylchloroisothiazolinone (CMIT). In general, their use in shampoos is more bactericidal than antiseptic. Although such preservatives may cause skin irritation, rash, contact dermatitis and other allergic symptoms. However, no cases have been found in which allergic reactions have occurred using shampoos containing these ingredients. This is because the Ministry of Health's "Hygienic Standard for Cosmetics (2007 Edition)" stipulates that MIT alone has a maximum allowable concentration of 0.01% in cosmetics, and the maximum allowable concentration of 0.0015% in cosmetics with CMIT (at CMIT and MIT). The mixture of 3:1 was found to be very weak. What other shampoo mistakes? 1. How often do you wash your hair? Distribution quality. People with dry scalp, dry hair, can be washed once every 2-3 days. It is also possible to wash the oily scalp or people who sweat more in the summer. 2. Does hair washing really cause hair loss? will not. Our normal people will also drop about 100 hairs every day. So shampooing sees so many drops of hair is normal. 3. Do you want to use a hair dryer? need. For girls with long hair fluttering, still need to use a hair dryer, as long as the wind is smaller, the temperature is lower, and the hair is farther away. 4. Is the shampoo applied directly to the hair or applied to the hand first? Yes. As long as you are not allergic to shampoo ingredients, there is no need to worry that some ingredients will irritate the scalp because the amount is really small. 5. Do you need to wash your scalp when shampooing? Need, and still focus. The scalp is the part that secretes a lot of oil every day, and there is a lot of sweat, dander, microbes, etc., so it needs to be cleaned. |
