Increase in subjective well-being and psychological health after application of C8-silk lipoamino acid functionalized pigments included in a foundation.
cortisol
foundations
make-up cosmetics
mood
psychophysiological approach
self-esteem
stress
Journal
International journal of cosmetic science
ISSN: 1468-2494
Titre abrégé: Int J Cosmet Sci
Pays: England
ID NLM: 8007161
Informations de publication
Date de publication:
Oct 2019
Oct 2019
Historique:
received:
12
07
2019
accepted:
31
07
2019
pubmed:
7
8
2019
medline:
3
4
2020
entrez:
7
8
2019
Statut:
ppublish
Résumé
The aim of this study was to evaluate the effects of two foundations before (D0) and after 5 days of application (D6) on psychophysiological parameters in order to compare C8-silk lipoamino acid functionalized pigments (FA) versus pure pigments (FP). Assessment of self-esteem, stress, mood and emotion using psychological tests and evaluation of salivary cortisol concentrations were realized on 40 healthy females using a crossover study design at D0 and D6. Four saliva samples were taken on the awakening (C1), 30 min after the awakening (during the foundation application (C2)), 1 h after the foundation application (C3) and at 1900 h (C4) at DO and D6. Area under the curve was calculated in order to obtain information about the total amount of a given substance excreted in a specific time period. Five days of daily application of the foundation containing the pigments treated with the C8-silk lipoamino acids induced a significant increase (P < 0.001) in self-esteem and pleasant emotion (P < 0.05), and a significant decrease in general stress (P < 0.05). This was not the case after the FP application. Cortisol concentrations presented a pronounced diurnal rhythm whatever the foundation used. At DO, no significant differences were observed between the groups. At D6, cortisol concentrations measured 30 min and 1 h after the FA application were significantly lower (P < 0.05: C6.2, P < 0.05 C6.3, respectively) than those reported after FP application. AUC, a global stress response indicator, was significantly lower in FA group as compared to FP group after 5 days of application. Subjects found a decrease in tiredness signs and thought that FA has a good coverage. Our results show that incorporation of C8-silk lipoamino acid as agent of pigment functionalization brings new benefits to a foundation. Adopting a psychophysiological approach, which is not invasive to the subjects, we show the measurement of cortisol at the same time that psychological indicators provide a scientific approach to examine the beneficial effects of a cosmetic product. Le but de cette étude randomisée croisée était d’évaluer les effets de deux fonds de teints (pigments traditionnels (FP) versus lipoaminoacides de C8 soie (FA)) avant (D0) et après 5 jours d'application (D6) sur des paramètres psychophysiologiques. L’évaluation de l'estime de soi, du stress, de l'humeur et des émotions conjointement à l’évaluation des concentrations de cortisol salivaire ont été réalisées sur 40 femmes. Quatre prélèvements salivaires ont été effectués le matin au réveil (C1), 30 min après (pendant l'application du fond de teint (C2)), 1h après l'application du fond de teint (C3) et à 19h00 (C4) au début (D0) et en fin d'expériementation (D6). RÉSULTATS: Cinq jours d'application quotidienne du fond de teint contenant des pigments traités au lipoaminoacides de C8 soie ont induit une augmentation significative (P <0.001) de l'estime de soi et des émotions plaisantes (P <0.05), ainsi qu'une diminution significative du stress (P < 0.05). Ces résultats n'ont pas été observés après application du pigment traditionnel (FP). En début d'expérimentation (D0), aucune différence significative n'a été observée entre les groupes concernant les concentrations de cortisol salivaire, concentrations qui présentaient un rythme diurne prononcé. A D6, les concentrations de cortisol mesurées 30 minutes et 1 heure après l'application de FA étaient significativement inférieures (P < 0.05: C6.2, P < 0.05: C6.3, respectivement) à celles rapportées après l'application de FP. Les sujets ont constaté une diminution des signes de fatigue. Nos résultats montrent que l'incorporation du lipoaminoacide de C8 soie en tant qu'agent de fonctionnalisation des pigments apporte de nouveaux avantages à une base de fond de teint. L'approche psychophysiologique non invasive est une excellente approche permettant d’évaluer les effets bénéfiques d'un produit cosmétique.
Autres résumés
Type: Publisher
(fre)
Le but de cette étude randomisée croisée était d’évaluer les effets de deux fonds de teints (pigments traditionnels (FP) versus lipoaminoacides de C8 soie (FA)) avant (D0) et après 5 jours d'application (D6) sur des paramètres psychophysiologiques.
Substances chimiques
Amino Acids
0
Coloring Agents
0
Cosmetics
0
Lipids
0
Placebos
0
Silk
0
Hydrocortisone
WI4X0X7BPJ
Types de publication
Journal Article
Randomized Controlled Trial
Langues
eng
Sous-ensembles de citation
IM
Pagination
489-495Subventions
Organisme : GREENTECH
Organisme : STRAND
Informations de copyright
© 2019 Society of Cosmetic Scientists and the Société Française de Cosmétologie.
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