Sunscreen additives damage hair follicle stem cells

the weather began to heat up in the blink of an eye, and many Emmys couldn't wait to start using sunscreen. In recent years, "sunscreen in the end is not harmful to the body" has been a hot topic, but even "harmful theory" holders, the generally considered harm is only "the skin irritation is larger, easy to clog pores, easy to breed acne acne, easy to appear allergic symptoms" and so on. Recently, Professor Shen Wei of Qingdao Agricultural University published a research paper in
, an internationally renowned academic journal, systematically explaining how nano-zinc oxide, a sunscreen additive applied to the skin surface, invades skin tissue through hair follicle structure and has a negative impact on skin tissue.
" nano-zinc oxide has a special physical properties, applied to the skin surface can effectively absorb UVA and UVB, to prevent skin UV damage. And its application to the skin is transparent, will not reflect, that is, it does not look oily, more in line with the needs of Emmy women, so these properties make nano-zinc oxide a common sunscreen additives. Shen Wei told reporters, according to statistics, the world every year about 2000 tons of metal oxide nanoparticles are put into the skin care industry, as a sunscreen additives used. Studies have shown that the addition of nano-zinc oxide to mammalian cells under in-body culture can lead to programmed cell death and serious cell damage.
oxide particles applied to the surface of the skin can cause damage to the body through the skin barrier, which is not clear. Therefore, Shen Wei's team applied nano-zinc oxide and hair follicle stem cell in-body culture experiments through mouse skin, and systematically described the damage path of nano-zinc oxide applied to the skin surface of mice through hair follicle structure. The study found that periodic application of nano-zinc oxide will cause these nanoparticles to accumulate in mouse hair follicles, and with the increase of accumulation concentration, eventually lead to nano-zinc oxide on the differentiation potential of stem cells in hair follicles damage, affecting normal skin stability.
, each hair on the skin produced a skin depression, that is, pores. Where the pores extend down into the depth of the leather is the hair follicle. Hair follicles are cystic tissues that surround the roots of hair and are skin cells that make hair grow. Many women envy ice goddesses with delicate skin so delicate that they can hardly see pores in the summer, so all kinds of hair-stripping creams sell well in summer.
shen Wei told reporters that excessive use of sunscreen, will also lead to the skin looks smoother, but in fact is damaged skin hair follicles, so that hair can not grow normally, long-term skin health is very adverse. "The reduced differentiation of hair follicle stem cells reduces the differentiation of hair and other cells, which can affect functions such as skin exhaust sweating. Therefore, it is also important to protect the hair follicle structure for people's health. (Source: Science Network Liao Yang Zhou Weiwei)