Does Sensodyne Have Sodium Lauryl Sulfate?

Written & Reviewed by Dr David Chen

Most sensodyne toothpastes do not have sodium lauryl sulfate as one of the ingredients but there are a few exceptions which do have SLS. As an example, the sensodyne repair and protect toothpaste does contain SLS.

Sensodyne repair and protect with SLS
With SLS

Therefore, if you’re looking for product that does NOT have it, you must read the label carefully to make sure that it doesn’t.

Nonetheless, we’ve compiled a list of all of the sensodyne toothpastes that do have it and ones that don’t have it. We hope that’ll make it easier for you to choose the one that you’re looking for.

Sensodyne toothpastes without SLS

The vast majority of the sensodyne toothpastes as well as their pronamel line of products do not contain SLS for the most part. Below is a complete list of all of their dentifrices that do not have it as part of their ingredients.

Sensodyne that does NOT have SLS:

  • Sensitivity and Gum toothpaste
  • Extra whitening toothpaste
  • Fresh mint toothpaste
  • Full protection toothpaste
  • Natural white charcoal toothpaste
  • Pronamel intensive enamel repair
  • Pronamel mineral boost
  • Pronamel gentle whitening
  • Pronamel multi-action
  • Pronamel fresh breath
  • Pronamel daily protection

Note: We did not include the different flavors for each of the product lines. All of the various flavors have the same ingredients except for the flavoring component.

Sensodyne pronamel intensive enamel repair SLS-free
Without SLS

Overall, the entire Sensodyne Pronamel line of toothpastes do NOT have sodium lauryl sulfate in them. However, the non-pronamel dentifrices may have it.

Sensodyne toothpastes with SLS

There are a total of four sensodyne toothpastes with sodium lauryl sulfate in them. You should keep a close eye out for these if you’re looking for one without it.

Sensodyne that have SLS:

Note: We did not include the different flavors for each of these product lines. All of the various different flavors have the same ingredients aside from the flavoring component.

In summary, only the sensodyne toothpastes may have SLS while the sensodyne pronamel toothpastes do not have it at all.

Alternative SLS-free toothpastes

The major toothpaste brands such as Sensodyne, Crest, and Colgate may or may not have sodium lauryl sulfate in them. However, the natural toothpaste brands tend to make their dentifrices SLS-free and they will market it as so.

Toothpastes without SLS:

We’ve listed a couple of examples above but please be aware that not all brands are completely SLS-free. Some of their product lines may contain it while others do not.

Therefore, you must read the label carefully to make sure it isn’t part of the ingredients list. Feel free to explore other brands of dentifrices since the list we’ve provided is not all inclusive, it is merely meant to serve as an example.

Is SLS toothpaste bad?

SLS in toothpaste may or may not be bad for you depending on how you perceive it and your personal preference. There has been a lot of misinformation about its safety over the year but they are all untrue.

Alleged adverse effects that are false:

  • Cancer causing agent.
  • Ocular irritation.
  • Dermal irritation.
  • Oral toxicity.
  • Organ toxicity.
  • Hair loss.
  • Sensitization.

Sodium lauryl sulfate is relatively safe to use and that is why the FDA has even approved it to be used as a food additive. However, it is a very potent soap/detergent and may be more harsh than you would like to use in your mouth. What it can do is strip away natural oils in your mouth and may dry it out.

The purpose of SLS in toothpaste is to facilitate the removal of plaque and stuck food on teeth. It is able to do this because it is a surfactant, otherwise known as a detergent or soap.

Sometimes it could make your mouth a little too clean if you know what we mean. Nonetheless, any whitening toothpaste that is worth its salt will most likely have SLS in it because it is incredibly effective at removing plaque and stains on teeth.

Some people may prefer a more natural toothpaste and that is OK.

Effect on canker sores

According to research, it is unclear if using SLS toothpaste will increase the frequency and intensity for those suffering from canker sores. Some studies say that it does while others say there is insufficient evidence to make such a claim.

Dr Kurthy from KoR Whitening does agree that SLS toothpaste can make canker sores worse since it is a powerful soap. If you logically think about it, a detergent that will strip away lipids from an ulcerated sore in the mouth does sound like it’ll be painful. After all, keeping these areas well moisturized usually helps it heal faster.

Therefore, we would have to agree that it most likely delays the healing time for aphthous ulcers, meaning it would take longer to go away.

If you are a chronic suffer from canker sores we would recommend trying a toothpaste without it to see if it helps.


The vast majority of Sensodyne toothpastes do not contain sodium lauryl sulfate, especially the Sensodyne Pronamel product line. That is actually one way that sensodyne is different from pronamel toothpaste.

However, the regular sensodyne product line does have 4 types of toothpastes that do have SLS in them.

Sensodyne toothpasteSLS?
Sensitivity and GumNo
Extra whiteningNo
Fresh mintNo
Full protectionNo
Natural white charcoalNo
Repair and protectYes
Rapid reliefYes
Deep cleanYes
Complete protectionYes
Pronamel intensive enamel repairNo
Pronamel mineral boostNo
Pronamel gentle whiteningNo
Pronamel multi-actionNo
Pronamel fresh breathNo
Pronamel daily protectionNo
Summary of all sensodyne products and their SLS status

At the end of the day, SLS is safe to use to use not only for oral care products but also in other cosmetic products (shampoos, conditioners, soaps, etc). However, if you feel like it’s detergent power is too strong for your skin or mouth, you can opt for a SLS-free toothpaste.


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