1. We are all born with a healthy vibrant ecosystem for our hair andscalp. The hair and scalp are naturally covered with peptides, oils and proteins that protect us from bad germs. Sodium lauryl sulfate and close chemical cousins called organosulfates are the main cleanser in the vast majority of shampoos.
2. An industrial degreaser, when used on hair, SLS completely destroys this natural protective layer. Then it coats the hair with the chemical residue, leaving a negative electrostatic charge which in turn makes the hair unmanageable and dry.
3. Conditioners contain chemicals that neutralize this negative charge but leave a dulling film. Silicones, like those used in car polish, are added to impart shine and a smooth silky feel. Almost every shampoo and conditioner works this way. They strip the hair and scalp’s natural protective substances then coat the hair with the sulfate film and then coatthis film with silicones to mask thedamage behind a fake shine.
我们所有人刚生下来时,头发和头皮都有健康活力的生态系统。头发和头皮上天然覆盖着肽,油和蛋白质,保护我们免受不良病菌的侵害。月桂基硫酸钠和被称为机硫酸盐的近似化学表亲是绝大多数洗发水中的主要清洁剂。
作为一种工业去油剂,SLS 用在头发上时,会彻底破坏这个天然的保护层。然后将化学残留物覆盖在头发上,留下负静电,进而使头发变得没法梳理,变得干燥。
护发素中含有的化学物质可以中和这种负电荷,但会留下一层黯淡的薄膜。像汽车抛光剂中使用的硅树脂,被添加进去,以赋予头发光泽和丝滑感。几乎所有的洗发水和护发素都是这个作用原理。它们去除头发和头皮的天然保护物质,然后在头发上覆盖硫酸盐膜,再在这层膜上覆盖硅树脂,以掩盖虚假光泽背后的伤害。