现代化妆品生产厂家在他们的产品里添加了各种营养物质,如蛋白质、蜂王浆、维生素、激素、人参、珍珠粉、稀有矿物,甚至胎盘提取物、玉米胚提取物等。这些添加物能给你的皮肤带来多少营养呢?人们是否值得花那么多的钱去使自己的皮肤得到很好的营养?要回答这个问题,先得了解皮肤是怎样获得营养的。皮肤分两层:表皮层和真皮层。其中表皮层的最外面是由坚硬而致密的死细胞构成的角质层。角质层坚实、紧密,能有效的防止细菌、有害化学物质、射线等的侵入。在角质层表面,又有 Modern cosmetic manufacturers add a variety of nutrients to their products, such as protein, royal jelly, vitamins, hormones, ginseng, pearl powder, rare minerals, and even placenta extract, corn germ extract and more. How much nutrition do these additives bring to your skin? Are people worth the extra money needed to get good nutrition for their skin? To answer this question, first understand how the skin is nourished. Skin divided into two layers: the epidermis and dermis. The outermost layer of the epidermis is the stratum corneum consisting of hard and dense dead cells. Stratum corneum is solid, close, can effectively prevent bacteria, harmful chemicals, radiation and other intrusion. In the stratum corneum surface, there are