To be absorbed through the skin， a chemical must pass through the epidermis， glands， or hair follicles. Sweat glands and hair follicles make up about 0.1 to 1.0 percent of the total skin surface. Though small amounts of chemicals may enter the body rapidly through the glands or hair follicles， they are primarily absorbed through the epidermis. Chemicals must pass through the seven cell layers of epidermis before entering the dermis where they can enter the blood stream or lymph and circulate to other areas of the body. Toxins and toxicants can move through the layers by passive diffusion. The stratum corneum is the outermost layer of the epidermis and the rate-limiting barrier in。
2019年4月，《消费者报道》送检了12款宣称有“防落发”功效的洗发水，而且几乎都是大牌。一位资深药物分析师对本刊表示:“长期使用含禁用性激素的化妆品，会干扰人体内正常激素的平衡，一旦内体雌激素过高或不平衡，会对健康造成危害，还会产生依赖性。”
作为一个油头星人，一天不洗头，头发油的都能炒菜了，再加上孕期不怎么方便，真的是太难了!所以，洗发水并不是越贵越好，而是要选择适合自己的发质，效果才是最好的，这5款口碑不错的洗发水，控油又养发，孕妇也可以放心用，看看哪款适合你。
检测孕妇可用的洗发水，打分榜单来了!不知道大家是不是都有同样的感受，每次洗完头发之后，都感觉自!拿我自己来说，每次洗完头发我都会忍不住拿出手机咔咔咔~一大波秀发蓬松，发量多到可怕的美照就此诞生，只要朋友圈发照片，那绝对是我刚洗完头发没多久...
