Impact of cleansing products on the skin surface pH / Uwe Aßmus in IFSCC MAGAZINE, Vol. 16, N° 1 (01-02-03/2013)

[article]  inIFSCC MAGAZINE > Vol. 16, N° 1 (01-02-03/2013) . - p. 17-24 Titre : Impact of cleansing products on the skin surface pH Type de document : texte imprimé Auteurs : Uwe Aßmus, Auteur ; Bernhard Banowski, Auteur ; Michael Brock, Auteur ; Jessica Erasmy, Auteur ; Andreas Fitzner, Auteur ; Uta Kortemeier, Auteur ; Silke Langer, Auteur ; Sven Munke, Auteur ; Hartmut Schmidt-Lewerkühne, Auteur ; Doerte Segger, Auteur ; Gunja Springmann, Auteur ; Claudia Wood, Auteur ; Jürgen Blaak, Auteur Année de publication : 2013 Article en page(s) : p. 17-24 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cosmétiques Peau -- Nettoyage Peau -- Soins et hygiène pH -- Mesure Savon Index. décimale : 668.5 Parfums et cosmétiques Résumé : The project was conducted to evaluate the effect on the skin surface pH of application of surfactant systems of different pH. Enhancement of the physiological stratum corneum pH leads to abnormal epidermal barrier function. Skin cleansing products are known to influence the skin surface pH. Studies have shown that various effects on the skin surface pH are related to a pH shift and restoration. Because of the varying results, a literature survey and a multicenter study were performed to evaluate the effect of skin cleansing on skin surface pH. The literature survey was conducted on the topic "Influence of cleansing products on skin pH". Moreover, a controlled and randomized multicenter study was performed with 63 healthy male and female subjects. The skin surface pH was measured before and after a standardized washing procedure with three different cleansing products and water. Publications since 1970 reveal different methods, conditions, panels and effects on skin surface pH. The changes in skin surface pH described after skin cleansing vary ±0 to +3.0 units. Biophysical measurements show that not only the product pH but also the combination of surfactants is a crucial factor in maintaining the natural skin pH. Finding the optimal ratio of surfactants in combination with an acidic product pH between 4 and 5 will be an important challenge for cosmetic chemists in the future. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17828 [article]

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Multicenter study on measurement of the natural pH of the skin surface / Doerte Segger in IFSCC MAGAZINE, Vol. 10, N° 2 (04-05/2007)

[article]  inIFSCC MAGAZINE > Vol. 10, N° 2 (04-05/2007) . - p. 107-110 Titre : Multicenter study on measurement of the natural pH of the skin surface Type de document : texte imprimé Auteurs : Doerte Segger, Auteur ; Uwe Aßmus, Auteur ; Michael Brock, Auteur ; Jessica Erasmy, Auteur ; P. Finkel, Auteur ; Andreas Fitzner, Auteur ; Helgard Heuss, Auteur ; Uta Kortemeier, Auteur ; Sven Munke, Auteur ; Thomas Rheinländer, Auteur ; H. Schmidt-Lewerkuhne, Auteur ; Werner Schneider, Auteur ; Gabriele Weser, Auteur Année de publication : 2007 Article en page(s) : p. 107-110 Note générale : Bibliogr. Langues : Anglais (eng) Tags : 'pH  naturel  'Peau  humaine'  'Avant-bras' Index. décimale : 668.5 Parfums et cosmétiques Résumé : Characterization of the skin's natural state is very important for understanding skin functions and describing disturbances of skin function. In the field of cosmetics and dermatologicals the natural pH of the skin surface plays an important role in the development of products with a skin neutral pH. In a multicenter study the natural pH of the skin surface (exception of underarm and genital areas), was to be measured. It was to be determined whether gender-specific differences in the pH occur. The skin surface pH was measured on the inside of the forearms in 222 volunteers (147 female, 75 male) using the skin pH meters of the respective institutes. The pH was measured in triplicate on adjacent areas 24 h after the last contact of the measuring site with water, topical applications and an intensive washing procedure. The values of the skin surface pH were 4.9 (arithmetic mean). The 95% interval was between 4.1 and 5.8. The pH on the forearm of the male volunteers was slightly lower than that of the females. The difference was statistically significant (p < 0.01; 4.8 to 5.0). The authors suggest that the GDCh recommendations for the claims »skin neutral pH«, »ideal pH« or »skin-friendly pH« should be revised and propose a pH range of 4.1 to 5.8 for the main body areas excluding the underarm and genital areas. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=10419 [article]

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