Author: Victoria Aly
Time for reading: ~4
minutes
Last Updated:
February 15, 2026
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But, that’s all we had, till 1999, while a randomized, double-blind, crossover trial changed into published:
And, “no large” variations were cited.
It didn’t seem to count whether or not the toothpaste had sodium lauryl sulfate or not.But, What About The Study Showing The 70% Decrease?
Well, maybe it’s because those instances were worse.
And so, the type of toothpaste handiest topics when you have without a doubt bad canker sores. And, that’s wherein the technological know-how ended, till 13 years later, when Korean researchers preferred the torch.We had reviews showing SLS-unfastened toothpaste facilitates;
we had other studies that determined no advantage, main “to big controversy.” And so, they released the most important study to date—90 subjects, and, equal number of ulcers and ulcer episodes.So, switching to an SLS-free toothpaste may additionally “now not reduce the quantity of” canker sores you get, however, it may permit them to heal quicker, and cause them to less painful.
So, yeah, sodium lauryl sulfate can create an “impression of cleanliness,…a mouthful of froth ‘simply feels cleanser.'” But, there may be a drawback: potentially “reduc[ing] the protective barrier of [our mouth lining],…likely because of [the] rupture of the [bonds that hold our cells together], now and again inflicting “sloughing, ulcerations, and irritation,” drying out “the protective mucous layer lining” our mouth, making us greater “prone to irritants.” But, wait;how do they provide an explanation for that their research found a trouble, but the last poll didn’t?
Well, they explain Koreans have a tendency to like their spicy meals;
and so, maybe that makes a difference. Regardless, if you get canker sores, you may want to provide an SLS-free toothpaste a attempt to see if it makes any distinction on your case.But, non-SLS toothpaste may additionally simply have other detergents, maximum usually cocamidopropyl betaine.
Is that any higher? Well, what these Swiss researchers did changed into to take nine toothpastes—Colgate, Crest, Oral-B, Sensodyne, and so on., and drip them on some human gum cells taken sparkling from folks who had their knowledge enamel extracted, after which use “live-dead cell staining.” Basically, you stain all of the cells inexperienced, and then, you add a crimson dye that covers up the green—but handiest in useless cells, because the stay cells actively pump out the red dye.So then, live cells live green, but dead cells turn red.
Let’s see if you may guess if Colgate has SLS within it.What about Crest?
Mostly red, often lifeless. But, guess if Sensodyne has SLS within it.All inexperienced, all alive.
SLS or no?
Versus this one, this one, or this one? It appears quite clean that is which.But that’s within a petri dish.
Does that translate out into real tissue harm in humans? A double-blind crossover research:SLS-containing toothpastes as opposed to CAPB-containing toothpastes.
Forty- desquamative reactions, which means tissue-peeling reactions, after four days of four mins a day of the SLS toothpaste on their gums, compared to simply three with the alternate detergent.neither SLS nor CAPB.
How does this translate out into canker sore frequency? How about a randomized, double-blind, crossover study “to investigate the impact of toothpastes containing” SLS as opposed to CAPB, as opposed to no detergent at all?They determined “considerably better frequency of [canker sores]” while sufferers brushed with an SLS-containing toothpaste than with a non-SLS toothpaste. So, they recommend that “SLS-unfastened toothpastes…be advocated for patients with recurrent [canker sores].” But, they discovered more than simply that.
Yes, SLS turned into the worst, however the non-foaming toothpaste—the detergent-loose toothpaste—beat them each out. The non-foaming toothpaste “precipitated appreciably fewer…ulcers” than the non-SLS opportunity detergent, CAPB, which within turn “precipitated significantly fewer…ulcers” than the SLS toothpaste.So, the massive most of the ordinary canker sore patients might advantage from switching from a normal toothpaste to a non-foaming toothpaste, however most would benefit just staying far from the SLS, regardless.
But, If Your Toothpaste Doesn’t Have Sodium Lauryl Sulfate, Will It Work As Well?
I’m now not simply talking approximately “the influence of cleanliness,” but real like plaque and gingivitis.Yeah, SLS may kill our cells, but it additionally kills micro organism cells;
so, might SLS-free toothpaste now not work as well? We didn’t recognise, until now.And, it seems the SLS-unfastened toothpaste labored just as properly, in regards to lowering gingivitis and plaque, and so may be “endorsed for [those with] recurrent [canker sores],” considering sodium lauryl sulfate may additionally make things worse with the aid of disintegrating the protective mucous layer, and sooner or later penetrating into the deeper layers of the liner of our mouth, where “residing tissue [function] can be compromised.” However, folks did miss the foaminess.
Though there's one extra benefit to selecting SLS-unfastened toothpaste: SLS also penetrates into our tongue, and interferes with the inner mechanisms of our taste cells.Sodium lauryl sulfate is what’s accountable for the “orange juice effect,” that weird flavor you get from citrus proper after you sweep.