What is SLS?
A surfactant.
← All explanationsSodium lauryl sulphate (SLS)
What does SLS on a toothpaste tube mean?
Sodium lauryl sulphate, or SLS, is a surfactant used for purposes including creating foam in toothpaste. It is not the fluoride ingredient. With sensitive oral tissues or recurrent mouth ulcers, it can be useful to discuss a suitable SLS-free toothpaste.
For training & practice ↓
AI-generated
Choose a view
Distinguish the ingredients
SLS relates to formulation and foam. Fluoride has a different role in decay prevention.
Observe tolerance
Burning or sore tissues can have different causes. Symptoms occurring after product use are a clue, not proof of allergy.
Choose appropriately
A replacement toothpaste should still suit your decay risk. Less foam does not automatically mean less effective cleaning.
Read the full explanation
Distinguish the ingredients
SLS relates to formulation and foam. Fluoride has a different role in decay prevention.
Observe tolerance
Burning or sore tissues can have different causes. Symptoms occurring after product use are a clue, not proof of allergy.
Choose appropriately
A replacement toothpaste should still suit your decay risk. Less foam does not automatically mean less effective cleaning.
Notes on the teaching images
- The tube symbolises toothpaste. SLS is a surfactant, not the fluoride ingredient; the actual formulation appears on the product.
- Burning or sore tissues may have several causes. An association with a product does not prove allergy.
- SLS-free does not mean fluoride-free. A change should consider both tolerance and decay prevention.
At a glance
Must it be absent?
Not generally; tolerance matters.
What needs attention?
Persistent tissue changes.
Knowledge in motion
Explained in 36 seconds.
Three steps. No audio.
Each scene can also be selected manually.
Silent educational film with German on-screen text and simplified teaching images. Not a patient case or a promised treatment outcome. The full English explanation is available as text.
Often confused
Foam and protection
Heavy foaming does not measure decay prevention. Suitable ingredients and actual cleaning matter.
Quick answers
Does SLS cause ulcers in everyone?
No. Mouth ulcers have different possible triggers. Trying an SLS-free product may be reasonable with symptoms, but it is not a promised treatment.
Does SLS-free mean fluoride-free?
No. These are different properties. The ingredient list shows whether fluoride is present and in which form.
When is changing toothpaste not enough?
An ulcer lasting more than three weeks, unusually large or changing should be examined. Recurrent symptoms should also be discussed.
At the practice
For a personal discussion
Editorially suggested question to discuss with Dr Niusha Barahmand Pour:
Which ingredients or other factors might contribute to my symptoms?
Does toothpaste burn or do ulcers keep returning? The cause and suitable care can be discussed.
Have oral discomfort assessedAppointment selection at DoctolibLearning layer for training & practiceUnderstand terminology and deepen knowledge
- Surfactant
- A substance that changes surface tension.
- Aphthous ulcer
- A localised painful oral sore.
- Tolerance
- How well a person tolerates a product.
Make the distinction
Heavy foaming does not measure decay prevention. Suitable ingredients and actual cleaning matter.
Sources and context
Editorial research: . General information, not an individual diagnosis or treatment recommendation. Teaching illustrations are simplified and do not depict a patient case.