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Not all sulfates are created equal


All shampoos contain surfactants (a term that's short for SURFace ACtive Agents) which are compounds that can mix oils and water and lower the surface tension between two liquids or between a liquid and a solid. There are different categories of surfactants:

  • Detergents
  • Emulsifiers
  • Foaming agents
  • Wetting agents
  • Dispersants


The most foaming and the most detergent are the anionic surfactants. These allow a cleansing product to foam up and lift and disperse dirt, oil and other debris. The anionic surfactant that is most frequently used in shampoos is Sodium Lauryl Sulfate (SLS), which is known to be an irritant.

Because KLORANE shampoos are formulated according to the highest pharmaceutical standards of parent company Pierre Fabre, our formulas do not contain SLS. Instead, the brand formulates its shampoos with Sodium Laureth Sulfate (SLES). The two surfactants are often confused, but SLS and SLES are two completely different chemicals. KLORANE selects SLES for its gentler yet thorough cleansing action.

The Research and Development Department of Pierre Fabre Laboratories has studied the effects of SLES in comparison to other surfactants like Polysorbate-20, a common sulfate substitute, and demonstrated that SLES is less aggressive on the skin and on the scalp and removes less of the naturally protective hydrolipidc film on the hair shaft.



Every Klorane Shampoo is SLS-Free and Clinically Tested to Ensure Safety


All 13 SLS-free KLORANE shampoos are clinically tested under stringent dermatological control in order to ensure the utmost safety and tolerance of products, based on ethical and good clinical practice principles. When formulating hair care products including shampoos, KLORANE Laboratories selects only plants shown to have specific properties to meet specific hair needs. These plants undergo a rigorous process from selection through the development of the selected plant extract, which ensures the availability, traceability and consistent efficacy of raw materials. This unique approach, known as Pierre Fabre Botanical Expertise is a certified process for the responsible development of plant-based ingredients that guarantees consumers receive safe, innovative and effective products.