You may have already heard of these, and if you throw the term “sodium lauryl sulfate” into Google it will return loads of articles full of warnings, with words like toxins, carcinogens, cancer, and other evils.
Some sound more researched, while others clearly have no sense of what they are talking about. Looking at it from the perspective of a molecular biologist, it comes across as a bit sensationalist to me, and I think it is important to bring a bit of fact-based truth to the issue. So, is your shampoo causing you harm?

Is Sodium Lauryl Sulfate in my Shampoo Toxic or Dangerous?
There has been a rising concern over the man-made chemical sodium lauryl sulfate, commonly used in soaps and cleaners like shampoo. Is your shampoo really safe?
What is Sodium Lauryl Sulfate?
Sodium lauryl sulfate is derived from coconut plants, and is then processed into the very popular cleaning agent.
A simple explanation of the chemical is that it has a fatty acid chain on one end of the molecule, attached to a long carbon chain that makes up a salt on the other end of the molecule.
The fatty acid end will pick up fats, such as oils in hair, while the salt end will dissolve in water. This helps wash away dirt saturated oils, when you rinse shampoo out of your hair or soap off of your hands.
It is quite a nifty and effective chemical. It is abundant enough, and is easily and cheaply attained, which is why it has become so ubiquitous in all types of cleaners and soaps.
This chemical’s ability to remove oils so easily is also why it is found in laundry and dish soaps, as well as in industrial strength cleaning supplies used in places like an auto repair shop.
It is worth noting that just because this same chemical is also used in harsher cleaners, they are by no means used in the same concentration. The chemical is found in a far more diluted form in domestic products.
A critique of sodium lauryl sulfate in domestic products is that it strips your hair or skin of natural oils, which can leave it very dry. This brings about the need for conditioners and lotions that then replace natural oils with synthetic oils.
While this critique is worth bearing for persons concerned with natural, or organic health and beauty care, it does not mean washing with a soap containing sodium lauryl sulfate is hazardous to your health. And similarly, many of the completely natural products can be equally drying.
Is Sodium Lauryl Sulfate Dangerous?
In terms of causing health problems, it is not dangerous.
Sodium lauryl sulfate and related chemicals have been shown through clinical trials to be non-toxic, and are not carcinogenic (or cancer causing).
So, if you’ve been reading up on SLS, and similar chemicals, and you’ve been told you are pouring toxins all over your skin and hair, clinical trials show that statement to be totally incorrect.
While SLS is not a toxin, and won’t cause cancer, it is a known irritant. As per warnings on products, it can cause irritation to the skin and eyes. There has also been some indication that toothpastes containing sodium lauryl sulfate may be linked to canker sores in the mouth, in sensitive individuals.
But, that does not mean there is need for concern. Being a known irritant means it is just that- it is something that may or may not cause irritation to sensitive individuals. Grass is also a known irritant.
Sodium Laureth Sulfate (SLES) and Sodium Lauryl Sulfate (SLS) are not the same.
They are similar in function, and somewhat similar in structure, but sodium lauryl sulfates (SLS) are not the same as sodium laureth sulfates (SLES), either of which can be found in any of the listed products.
Sodium laureth sulfate is generally not considered to be any more or less dangerous than sodium lauryl sulfate by itself, but SLES can become contaminated with dioxane, which is a known carcinogen. Reports have shown that low levels of dioxane can be traced in domestic products containing sodium laureth sulfate (SLES).
It would not be a waste of time to avoid products containing sodium laureth sulfate.
Would I recommend avoiding domestic products containing Sodium Lauryl Sulfate?
Some of the products I use do have SLS, and some do not.
My face soap is hand-made, because I have a lot of problems with acne. So, it doesn’t contain any of these chemicals. But, my hand soap is whatever is on sale at the drug store around the corner.
Personally, most shampoos make my head itch, and cause dandruff. I found significant improvement after switching to a shampoo that does not contain sodium lauryl sulfate.
It turns out sodium-coco sulfates do not cause itching problems for me, so products containing this form of the chemical work just fine for me. The shampoo I prefer is the ‘Say Yes to Carrots,’ which contains sodium-coco sulfate. I also prefer this shampoo because it is cruelty and paraben free.
There is an ever-growing market for those with similar sensitivity issues, or those who simply want to go a more all-natural rout.
With the advent of using natural, organic health and beauty products quickly approaching a mainstream norm, there many new product lines such as Bert’s Bees, or Alba, as well as long standing products such as the very popular Dr. Bronner’s Magic soaps, frequently showing up in many chain stores.
All of these products are free of man-made chemicals. But, the more natural products do tend to be significantly more expensive than a typical product found in a drug store, or grocery store aisle.
In the end, if your favorite shampoo, mouthwash, or other soaps and hygiene products contains SLS, but has never caused problems with severe dryness or irritation, then there is no pressing health problem. You are safe to keep using it. It isn’t going to kill you.
Do you think sodium lauryl sulfate is something to worry about?
51 votes

Comments
EmberOct 28, 2014
ologsinquito- Awww! I just saw that you pinned it, thank you so much!! <3 What shampoo do you use?
Rose- fair enough that it's really only a problem if it is causing you problems, like dandruff or itchy scalp
ologsinquitoMay 15, 2014
RoseNov 23, 2013
EmberAug 24, 2013
WriterArtist- Yes they are! Thank you for reading :)
WriterArtistAug 24, 2013
Natural_Skin_CareJul 12, 2013
EmberJun 11, 2013
Chris-I did talk about how SLES can become contaminated with dioxane, and that it had been traced in household products. That is SLES specifically. SLS is structurally different to SLES and doesn't become contaminated with dioxane like SLES can.
SimplySara- The bad guy here would be the SLES. I know it can be so confusing to keep track of it!
Getthefactsnothype-thanks!
tolovaj- Yes! And yes there are a lot of chemicals in the world...really when you break it down, everything is a chemical or multiple chemicals.
Sam- Thanks! I had several afternoons of reading after my mom gave me a rant about shampoos. I already knew what SLS was but it took reading clinical trials to know what, if any, potential dangers surrounded it.
Jo- :p (this is really really really laaaaaaate, but thanks!)
ChrisJun 9, 2013
katiem2May 2, 2013
SimplySaraFeb 11, 2013
TolovajSep 27, 2012
Thumbs up!
SamSep 26, 2012
JoHarringtonSep 24, 2012
EmberSep 24, 2012
You're welcome! And, thank you for the comment!
ThamisgithSep 22, 2012
I didn't know that it was in so many other products though. Thanks for the information.
EmberSep 21, 2012
Dustytoes- Thank you very much for the comment. I'm glad this came across clearly :)
katiem2- Thanks for the comment! You know, I have heard mention of it before, but I'm not sure what polyproylene glycol is, exactly...It is going to be some type of alcohol, and used in soaps as you said, but I don't know much past that as far as possible dangers without researching it. I know the first thing I think of is anti-freeze when I think of glycol. As far as soaps, an all natural product that can replace that in purpose is glycerol, which is similar but they are vegetable based, for example. I know I've seen things like vegetable glycerol for sale in organic/whole/natural based stores. Sometimes it can be hard to know whether something should be of concern. For example when I was researching for this, I came across people who would reference the MSDS (material safety data sheet), which will list what are called LD50 (the lethal dose it would take to kill on average 50% of the test population), so, yes SLS is listed with an LD50, but the thing about that is, even water has a lethal dose. It's knowing what a percentage means, and what way, and concentration that make the difference, but I understand the fright for someone whose never seen that before.
In general, you can't really go wrong with being chemical free. Especially with things like pesticides, and soooo many of the preservatives. One caution I think is important to have when going with all natural products is to remember that many poisons and radioactive elements are also 100% natural, and from the earth. And, the FDA (if you are in the US) does nothing to regulate almost any supplement. So, sometimes it is good to still be just as discerning, even when something tells you it is 100% natural and organic.
katiem2Sep 20, 2012
dustytoesSep 20, 2012
FRAKIESep 20, 2012
EmberSep 19, 2012
MiraSep 19, 2012
EmberSep 19, 2012
Also, qualified scientist xD
JoHarringtonSep 19, 2012
I love how you wrote this too. Even lay people like me could follow that so easily. Thanks for sharing this.
EmberSep 19, 2012
I don't know a lot about parabens, but I did read a study they did with rats that had some pretty shocking rates of cancer development. From what I understand, they mimic estrogen, and can cause breast cancer. :/ Not good stuff.
Thank you for the comment! :D