SLS – an ingredient found in many everyday products. What is it really?

If you start looking at the ingredients in different everyday products, you will quickly notice a recurring name: SLS (sodium lauryl sulfate). It is found not only in toothpaste, but also in shampoos, shower gels, facial cleansers, and even some cleaning products.

 

SLS is a substance that belongs to a group of compounds called surfactants. In simpler terms, it helps mix oil and water and creates foam. This is why, for example, shampoo or toothpaste feels like it “works” – a rich foam is produced, which gives the sensation of cleanliness.

However, it is important to understand that the foam itself is not what actually cleans. The real cleaning comes from mechanical action (such as brushing or washing), and in oral care, the most important ingredient is fluoride, which protects the teeth.

Why is SLS used so widely?

SLS is popular among manufacturers because:

  • it is inexpensive and effective
  • it produces a visibly rich foam
  • it gives users a “feeling of cleanliness”

 

That last point is especially important – people often associate foam with effectiveness, even though it is not directly related to cleaning performance.

SLS in toothpaste – is it a problem?

SLS has been used in toothpastes for decades, and for most people it does not cause any issues. If the mouth is healthy and there is no sensitivity, it is simply one ingredient among many.

However, it has been found that in some people SLS may cause side effects, such as:

  • irritation of the oral mucosa
  • more frequent canker sores (small mouth ulcers)
  • discomfort in sensitive gums

It is important to emphasize that SLS is not a “dangerous substance”, but rather a potentially irritating ingredient for sensitive mouths. Bluem products are designed to support oral health in situations where a standard SLS-containing toothpaste may feel too harsh.

Why do SLS-free toothpastes exist?

Because of this, SLS-free alternatives have appeared on the market, such as Bluem and other gentler oral care products. Their goal is not necessarily to be “better”, but to offer a solution for people whose mouths react more easily to irritation.

Instead of SLS, these products use other foaming and cleansing agents that do not create as strong a foam but still perform their cleaning function. The result can feel slightly different – less foam, but also less stinging or irritation in a sensitive mouth.


Is SLS-free toothpaste better?

There is no single answer to this, as it depends on the individual.

If someone has sensitive gums, frequent inflammation, or mouth ulcers, an SLS-free toothpaste may simply be a more comfortable and better-tolerated option. However, if the mouth is healthy, avoiding SLS is not necessary, and a regular toothpaste works just as well.

SLS-free Bluem products are available in the tervesuu.ee e-store and are designed to support sensitive or irritated oral conditions. In addition, Bluem products contain active oxygen, which supports oral health recovery.


SLS is an ingredient used in many everyday products because of its foaming and cleansing properties. In toothpaste, it is not strictly necessary, nor is it harmful for most people, but it may cause discomfort in sensitive mouths.

So the question is not whether SLS is “good or bad”, but rather whether your mouth tolerates it well. For most people, it is not an issue, but for those with sensitivity, an SLS-free toothpaste can simply be a more comfortable choice.

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