[Objective assessment of the effect of sodium lauryl sulfate on the surface of the skin in childhood].

The influence of sodium lauryl sulfate on physiological properties of the skin surface in children was assessed by continuous measuring of electric conductivity in the course of iontophoresis with physiological solution. The results achieved have shown that even very low concentrations of sodium lauryl sulfate (0.1% water solution) provoke changes of physiological properties in the skin surface. A concentration of 0.5% has been established to be the limit concentration of sodium lauryl sulfate which can evidently injure the barrier functions. The degree of changes in electric conductivity was not dependent on the intensity of the skin irritation.