Source: No.2 Institute of Zhejiang University
In the past two years, silicone free shampoo has been the "net red" in the shampoo industry. Because it is known as "refreshing, non greasy, scalp protection and anti stripping", whether it contains silicone oil has almost become a benchmark to judge whether shampoo is excellent. But in fact, can silicone free shampoo really resist allergy and prevent hair loss?
Daily choice of shampoo
Is silicone oil better?
Is it better to have no silicone oil?
Let's listen to Dr. Jing Jing, dermatologist, the second hospital of Zhejiang University.
Scalp allergy, alopecia still greasy?
Silicone shampoo doesn't carry this "pot"!
According to Dr. Jing Jing, silicone oil refers to dimethylsilicone oil, the common name of PDMS. Polydimethylsiloxane (PDMS) is a kind of hair conditioner. Its function in shampoo is to fill the gap between the outer layer of hair scales, make the hair more smooth and reduce knots.
At present, it is believed that the structure of silicone oil added in shampoos such as polydimethylsiloxane is stable, hardly absorbed by human skin and gastrointestinal tract, and has no stimulation effect on skin. In normal use, silicone shampoo will not harm the body. In addition, the concentration of silicon in the shampoo currently sold in the market will not exceed 4%. When shampoo is washed, the residual content in the hair is lower through the role of the cleaning ingredients in the shampoo and water washing. Therefore, the silicone oil shampoo from the Internet blocked the pores and caused hair loss, most of which were the propaganda stunts of the manufacturers.
Jing Jing said that if there is a period of time of scalp pruritus, scalp grease, dandruff and hair loss increase, it may be seborrheic dermatitis and seborrheic hair loss.
Seborrheic dermatitis and seborrheic alopecia
At present, the seborrheic dermatitis of the scalp is caused by genetic factors, mental factors, Malassezia on the skin surface and other bacteria. On the basis of excessive seborrheic spillage of the scalp, the increase of androgen metabolites such as dihydrotestosterone will make the hair thin and soft, causing seborrheic alopecia.
No silicone oil and silicone oil,
The doctor teaches you how to choose!
Asking some customers who choose shampoo in the supermarket found that although most people don't know whether silicone oil is harmful, more people choose to buy non silicone shampoo. When asked carefully, they don't know the difference between silicone oil and non silicone oil.
So how to choose the right shampoo for yourself?
Doctor Jing said that the choice of silicone oil or non silicone oil should be based on the quality of the hair.
? choose silicone Shampoo
If the hair is dry and fluffy, the shampoo containing silicone oil can make the hair more smooth and glossy. For dry hair or sensitive hair, the shampoo without silicone oil may stimulate, itch and desquamate the scalp, which is more likely to cause problems when the scalp barrier is disturbed. Some non silicone shampoo with vegetable oil, animal oil instead of more unstable structure, more likely to lead to skin allergies and folliculitis. Therefore, for the above types, it is necessary to use ordinary silicon containing shampoo products.
? choose silicone free shampoo
For seborrheic dermatitis and seborrheic alopecia patients, if you want to create a fluffy hair style, or recommend no silicone shampoo.
For hair and scalp health,
Pay attention to these!
Don't wash your hair too often
Generally, it is better to wash once every 2-3 days. Too often, it will stimulate the scalp to secrete more oil.
? avoid spicy food, try to be light and eat fresh fruits and vegetables.
Massage the scalp properly to promote the blood circulation of the head, which is beneficial to the health of the scalp and the growth of the hair.
? moderate ironing and dyeing
Perm and dye are not taboos, but the frequency must be moderate. However, the most important thing is health!
The dermatology department of the second hospital of Zhejiang University, as the national cosmetics adverse reaction monitoring and evaluation base, found through three years of observation that the adverse reactions caused by hair dye and perm are far more than those caused by shampoo. Dr. Jing reminded us that if there are adverse reactions caused by hair dye and perm, we must go to the regular hospital in time.
In addition to the above maintenance measures, doctors suggest that patients with serious desquamation can self inspect their scalp with oil suction paper at home, or come to the dermatology department to have a scalp dermatoscopy and hair pulling test to evaluate the condition of scalp dermatitis and hair loss. If the scalp erythema and desquamation are obvious, it is suggested to go to the hospital in time, make a dermatoscope and other diseases identification. During the treatment, special lotion can be used for external washing, combined with hasinide solution for external use, and patients with obvious pruritus can even be taken orally with drugs.
Doctor Jing reminded that in fact, most of the non silicone oil and non clogging pores advertised by online businesses are gimmicks to stimulate purchase. The choice of silicone oil or non silicone oil depends on the quality of personal hair.
Jing Wei
Doctor of medicine, chief dermatologist of Zhejiang University. Good at hair loss, dermatitis, psoriasis and other diseases diagnosis and treatment and skin surgery. At present, he has presided over one general program of NSFC and one youth program respectively, and served as the network review of NSFC and the appraisal review of the conclusion of NSFC in Zhejiang Province.