[article]
| Titre : |
In vivo analysis of the interaction of antioxidants and free radicals in human skin |
| Type de document : |
texte imprimé |
| Auteurs : |
Jürgen Lademann, Auteur ; Martina C. Meinke, Auteur ; Sabine Schanzer, Auteur ; Stefan F. Haag, Auteur ; Leonhard Zastrow, Auteur ; Ruo-Xi Yu, Auteur ; Bich Na Lee, Auteur ; Maxim E. Darvin, Auteur |
| Année de publication : |
2012 |
| Article en page(s) : |
p. 239-247 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Antioxydants
CaroténoidesLes caroténoïdes sont des pigments plutôt orange et jaune répandus chez de très nombreux organismes vivants. Liposolubles, ils sont en général facilement assimilables par les organismes. Ils appartiennent à la famille chimiques des terpénoïdes, formés à partir de la polymérisation d'unités isoprènes à structure aliphatique ou alicyclique. Il est généralement admis qu'ils suivent des voies métaboliques similaires à celles des lipides. Ils sont synthétisés par toutes les algues, toutes les plantes vertes et par de nombreux champignons et bactéries (dont les cyanobactéries).
Cosmétiques
Nutrition
Photoprotection
Produits antisolaires
Rayonnement infrarouge
Rayonnement ultraviolet
Spectroscopie de réflectance
Spectroscopie Raman
Stress oxydatif
|
| Index. décimale : |
668.5 Parfums et cosmétiques |
| Résumé : |
The availability of innovative noninvasive methods for the determination of free radicals and antioxidants in human skin allows new insights into the interaction process of free radicals and antioxidans. Summarizing the results of different studies shows that high levels of antioxidants represent an efficient prevention strategy against skin aging. The level of antioxidants in the human skin is strongly influenced by the lifestyle and stress conditions of the volunteers. The investigations were carried out using a noninvasive optical Raman spectrometer and a skin scanner for noninvasive remission measurements. In addition, electron paramagnetic resonance measurements were used to analyze both the radical formation in the skin after exposure to external stress factors and the antioxidative protection status. In a one-year study it could be demonstrated that the kinetics of the antioxidants in the human skin reflect the lifestyle of the volunteers. The antioxidatide status is strongly influenced byt the nutritional behavior and stress conditions. Analysis of skin aging ant the antioxidant status of the volunteers, all of whom were around 50 years of age and had not changed their lifestyle and nutritional behavior over the last decades, dmonstrated that a high level of antioxidants is the best protection strategy against skin aging. How these antioxidants can penetrate the skin best is described in the present article. For this purpose, the systemic and topical application of antioxidants is compared.
Taking into consideration the interaction between antioxidants and free radicals in human skin, the question arises whether sunscreens should provide protection against radiation not only in the UV but also in the visible and infrared solar spectra. Relevant measurements and results are presented and discussed in this paper. |
| Note de contenu : |
- Kinetics of the carotenoids in the skin of volunteersover a one-year period
- Influence of alcohol consumption and solar radiation on the antioxidant concentration of human skin
- Antioxidants and free radicals in sunscreens
- Antioxidants as an efficient prevention strategy against skin aging
- Biofeedback by antioxidant measurements
- Uptake of antioxidants |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16882 |
in IFSCC MAGAZINE > Vol. 15, N° 4 (10-11-12/2012) . - p. 239-247
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In vivo analysis of the interaction of antioxidants and free radicals in human skin in IFSCC MAGAZINE, Vol. 15, N° 4 (10-11-12/2012)
