Premium
Influence of skin cleansing preparation acidity on skin surface properties
Author(s) -
KORTING H.C.,
MEGELE M.,
MEHRINGER L.,
VIELUF D.,
ZIENICKE H.,
HAMM G.,
BRAUNFALCO O.
Publication year - 1991
Publication title -
international journal of cosmetic science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 62
eISSN - 1468-2494
pISSN - 0142-5463
DOI - 10.1111/j.1467-2494.1991.tb00552.x
Subject(s) - transepidermal water loss , chemistry , forehead , significant difference , chromatography , dermatology , medicine , surgery , stratum corneum , pathology
Synopsis Two long‐term trials were conducted each over eight weeks to compare the effect of the regular application of skin cleansing preparations of pH 5.5 and pH 8.5 and pH 5.5 and pH 7.0 respectively on the surface pH, roughness and transepidermal water loss (TEWL) of normal human forehead and forearm skin. Both trials were based on a cross‐over design: five healthy volunteers started with a pH 5.5 preparation and switched to the other after four weeks, five additional volunteers used the preparations in the opposite order. While the skin surface pH was markedly lower in those individuals using the pH 5.5 preparation at each examination, as compared to those using the pH 8.5 or pH 7.0 preparation, no such difference could be established with respect to skin roughness and TEWL. Hence the skin irritancy of a cleansing preparation does not seem to be linked to its pH within the pH ranges tested.