[article]
| Titre : |
The worldwide diversity of scalp seborrhoea, as daily experienced by seven human ethnic groups |
| Type de document : |
texte imprimé |
| Auteurs : |
F. Pouradier, Auteur ; C. Liu, Auteur ; J. Wares, Auteur ; E. Yokoyama, Auteur ; C. Collaudin, Auteur ; S. Panhard, Auteur ; Didier Saint-Léger, Auteur ; G. Loussouarn, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 629-636 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Cuir chevelu
Groupe ethnique
Mesure
Peau -- Physiologie
Sébum
|
| Index. décimale : |
668.5 Parfums et cosmétiques |
| Résumé : |
OBJECTIVE :
The re-greasing process and kinetics of the human scalp, post-shampooing, have been previously documented, in vivo, on a few Caucasian subjects. The objective of the presented research was to extend such knowledge over seven different ethnic groups.
METHODS :
The post-shampooing re-greasing kinetics of the scalp was studied on 1325 subjects (women and men of two distinct age classes) from seven different ethnic groups in their residential and native country. Sebum amounts were determined onto small shaved scalp areas at various times post-shampooing, using the Sebumeter® technique.
RESULTS :
As previously published on Caucasian subjects, scalp re-greasing process follows a hyperbolic-like kinetics over days. However, amounts of collected sebum highly vary with ethnicity. As recorded through the casual level (CL) at the equilibrium phase, 2–3 days post-shampooing, the highest amount of sebum was found in African American subjects, followed in descending order by Caucasian American, Japanese, Chinese, Thai, Caucasian European and Indian subjects, the latter showing very low values. Lower amounts of sebum were recorded in the older age class in all ethnics, as compared to the younger one, and male subjects were found higher sebum producers than women, irrespective of ethnicity.
CONCLUSION :
The kinetics and slopes of the re-greasing process of the human scalp appear similar in all ethnic groups studied. However, striking quantitative differences are found between the seven ethnic groups, resulting from different sebaceous production levels and scalp hygiene routines. |
| Note de contenu : |
- MATERIALS AND METHODS : Locations and timing of the studies - Subjects - Protocol - Statistics
- RESULTS : Sebum production over time in the seven groups
- DISCUSSION |
| DOI : |
10.1111/ics.12425 |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=29478 |
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 39, N° 6 (12/2017) . - p. 629-636
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