Skin impedance and moisturization

摘要: the in vivo evaluation of HYDRATION state STRATUM CORNEUM on human subjects are presented. The DIELECTRIC properties HUMAN SKIN have been investigated over a wide range frequencies (2 Hz-15 GHz). From stripping experiments it has established that low frequency IMPEDANCE Hz-1 K_Hz) is located almost entirely HORNY LAYER. Skin impedance measurements carried out relative humidity (rh)-controlled conditions using matched electrodes. An increase rh environment (at constant T o) causes an moisture content stratum corneum which demonstrated by decrease impedance. effect MOISTURIZING ingredients can be comparison values before and after treatment with ingredient convenient vehicle. Lasting long-term effects also assessed measuring time-course value during hours or days following treatment. In skin not protected against dehydration, provokes A BARRIER CREAM will act thus giving rise to lesser procedure testing protective creams drawn from this experiment. tentative interpretation relationship between hydration proposed basis experimental results.