• I Buraczewska, U Broström, and M Lodén.
• ACO HUD NORDIC AB, Research and Development, Box 622, SE-194 26 Upplands Väsby, Sweden.
• Br. J. Dermatol. 2007 Jul 1; 157 (1): 82-6.

BackgroundArtificial reduction of abnormal transepidermal water loss (TEWL) is considered to improve skin diseases associated with a defective barrier function. Treatment of the skin with moisturizers is also known to influence skin barrier function. Whether or not differences in occlusion between creams contribute to their effects on the skin barrier function is unknown.ObjectivesTo investigate the long-term effects of a semipermeable membrane on the skin barrier function in normal skin. In addition, the occlusive properties of two creams were studied.MethodsThe study was randomized, controlled and evaluator-blind using measurement of TEWL and skin susceptibility to sodium lauryl sulphate as indicators of skin barrier function.ResultsCoating of the skin with a silicone membrane for 23 h per day for 3 weeks improved skin barrier function, whereas no significant changes were found after using the membrane for 8 h per day.ConclusionsDifferences between creams in terms of their effect on skin barrier function cannot be solely explained by their occlusive properties.

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