Tina’s turmoil: I have been along time reader of another blog called Killer Strands and the writer (Dakota Ellis/Killer Chemist) is a hair colourist and a cosmetic chemist who has tested sulphate shampoos and proved it does fade color and may cause premature hair loss. She mentions it’s very caustic when smelled and may cause you to to faint when opening a jar of SLS !
The Left Brain’s reply:
Sulfate shampoos do cause fading however, they do not cause more fading than other types of shampoos. I can say that because I specifically evaluated all types of shampoos in unpublished research. But until that is published, it’s just hearsay. If you really wanted to prove it to yourself, use 2 different shampoos on each side of your head the next time you get your color done. One should be a sulfate based shampoo and the other should be non-sulfate based. After 5-10 washes you will not likely see any color difference between the two.
Dangerous sulfates?
The idea that sulfates make your hair fall out is just not true. No cosmetic chemist has ever proven this. Furthermore, while they are powerful degreasers and can dry out hair and skin, they are not caustic. And the notion that you will faint just by smelling a sulfate detergent is ridiculous. Sulfates have a weak, bland odor (it’s true that inhaling concentrated SLS can irritate your nasal passages but that will not make you faint.)
We have been in the cosmetic and personal care industry for many years and have not come across any published scientific study to show that sulfates are the worst thing for your hair color or would make your hair fall out. I suspect if you asked the Killer Strands folks for their data they won’t have any. And without the data, it’s just an unvalidated opinion.
Killer Strands
I looked up the Killer Strands website and it appears to be very professional and it contains a lot of good information. Dakota is doing a find job, but I couldn’t find any references to specific studies backing up her statements. You need to consider that while Killer Strands does make some good points, they are also trying to sell you their products and services.
The Beauty Brains bottom line
The Beauty Brains do not and will not sell cosmetic products. We do not recommend specific product brands and we encourage people to make up their own minds about what to buy. We present the unbiased science. If someone is trying to sell you a product, you have to read with skepticism everything that they write. It doesn’t matter if they are cosmetic chemists, board certified colorists, or dermatologists. Once a piece of writing is put out there with the intent to convince you to buy a specific type of product, watch out. The information is suspect.
What do YOU think? Have you noticed that different shampoos cause your hair to fade differently? Leave a colorful comment for the rest of the Beauty Brains community.
译文:
硫酸盐洗发水使头发掉色吗？
蒂娜的迷惑 不久前我读过一篇名为《头发杀手》的博客，作者是一个发型师和化妆品药剂师，她叫达科达.埃利斯。她对含硫酸盐的洗发水作了试验并且证实这种酸性洗发水会导致头发掉色和早脱。她特别提到：当你打开一瓶硫酸盐，它的气味非常刺鼻，以致于让你眩晕。
左脑的回答：
硫酸盐洗发水确实使头发掉色。不过和其他类型的洗发水相比也没那么严重。我这样说是因为我在一本未发表的研究中对所有类型的洗发水进行了测评。不过直到现在还没有发表，只是我的个人意见而已。如果你想证明一下，你可以下次染发后，把头发分成两片，使用两种不同的洗发水。一侧为硫酸盐洗发水，另一侧不用硫酸盐洗发水。洗头5-10次后，你就能发现两者的不同之处了。
危险的硫酸盐洗发水？
有关硫酸盐洗发水导致脱发的说法不是很正确。至今没有一个化妆品药剂师可以证实这点。况且，它的去污能力很强，虽然会让头发和皮肤变干，但不刺鼻。还有，关于闻到硫酸盐洗发水会使人眩晕的说法也是非常可笑的。硫酸盐很容易挥发，味道很淡。（吸入浓缩硫酸盐会阻塞鼻子但不会让你眩晕）
我们长期致力于化妆品和个人护理业，没有发表过任何科学研究证明硫酸盐最伤头发，让头发易掉。我猜想，你现在去问问那些“头发杀手论”的人，没有一个人还会这样说。毫无疑问，这是个假说。
头发杀手
我查阅了一下《头发杀手》网站，那里非常专业，涵盖很多好的讯息。达科达正在作一项探索，但我找不到任何有助于她的科学参考资料。持“头发杀手”论的人的最大的好处是，有利于出售他们的产品和服务。
头脑聪明最重要
头脑聪明的人不会去销售化妆品。我们不推荐产品的品牌，而是鼓励人们自主选择自己需要的产品，我们只是给予客观的意见。如果有人向你推销产品，不管他们是化妆品药剂师、权威染发师或者皮肤病专家，你得对他的论断留点戒心。一旦他们想用发表过的什么论断说服你购买某种产品时，当心！！这类信息很有可能是骗人的！
你在想什么呢？你发现不同洗发水的退色效果不一样了吗？还是把这个有趣的话题留给头脑聪明的人吧。