Martos Gibaile, Nathaly Cristina. Effect of insecticide diethyltoluamide (DEET) and co-applied sunscreens on percutaneous absorption. Retrieved from https://doi.org/doi:10.7282/T38K7C7S
DescriptionThe combination of sunscreens and insect repellents is widely used by the population, in all regions of the globe. Several published papers reported that the concomitant use of oxybenzone and N,N-diethyl-m-toluamide (DEET), common actives present in such products, can enhance the percutaneous permeation of each of the actives which is an undesirable outcome. In this study, we evaluated the effects of the insecticide DEET on the permeation of sunscreens octyl methoxycinnamate and octyl salicylate. Several combinations of the UV absorbers and the insect repellent were tested and percutaneous permeation of all actives was compared when they were co-applied on human skin, in vitro. The outcomes of these studies suggest that DEET did not enhance the skin permeability of octyl salicylate and octyl methoxycinnamate. However, the UV absorbers can be potential enhancers when mixed with DEET, because when the sunscreen actives were used in combination with DEET, the resulting skin permeation of the insect repellent was higher than the control.