In vivo test: reduction of IL-1Ra/IL-1A ratio in corneocytes
Method: sites on the forearms of the panelists (n=7) were treated with the test formulation (cream) and then irradiated with 1.5 MED (UVB+UVA). Test creams were applied immediately after application again. After that test creams were applied twice daily for 4 weeks. After 4 weeks corneocytes were collected from all sites by tape stripping L-1Ra/IL-1alpha ratio was evaluated. * IL-1Ra/IL-1A is the ratio of interleukin-1alpha (IL-1alpha) and IL-1 receptor antagonist (IL-1Ra)