4.2 Article

Fatty acid profile of new promising unconventional plant oils for cosmetic use

Journal

INTERNATIONAL JOURNAL OF COSMETIC SCIENCE
Volume 38, Issue 4, Pages 382-388

Publisher

WILEY
DOI: 10.1111/ics.12301

Keywords

chemical analysis; cluster analysis (CA); cosmetic oils; fatty acid composition; safety testing; statistics

Funding

  1. Department of Bromatology, Medical University of Warsaw

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ObjectiveOils have been used on the cosmetic application since antiquity. With the growing interest in cosmetic formulation of strictly natural origin there has been also an increased interest in the use of alternative oils obtained from nuts, herbs, fruit and vegetable seeds. Due to lack of good scientific reports on the cosmetic plant oils available in Poland, the aim of our research was to characterize fatty acids (FA) profile and oxidative quality of selected unconventional plant oils, which are used as cosmetics or potential cosmetic ingredients. MethodsOils were purchased from cosmetic health shops in Warsaw (Poland); FA profile was analysed by gas chromatography with flame-ionization detection. Peroxide index (PI), content of hydroperoxides (PV) and free fatty acids (AV) were also determined. ResultsOxidative quality and FA composition of examined oils varied widely among analyzed oils. Cluster analysis revealed three clusters. Clusters S1 and S3 include only one oil (Perilla and sea buckthorn, respectively). Perilla oil is characterized by relatively small content of both saturated FA (8.5%) and monounsaturated FA (14.2%) and much higher amount of polyunsaturated FA (73.5%) whereas in sea buckthorn these proportions are opposite (saturated FA and monounsaturated FA - 33.5% and 51.0% respectively, and the lowest amount of polyunsaturated FA - 5.2%). In cluster S2 two sub-clusters were distinguished and the content of linoleic (p = 0.0015), -linolenic (p = 0.0092) and oleic (p = 0.0015) acid caused this distinction. PI ranged from 8.9 in sea buckthorn oil to 135 in Perilla oil. Perilla oil and raspberry seed oil were also characterized by the highest PV (225 14.9 mEq O/kg oil and 232 13.8 mEq O/kg oil, respectively), whereas the lowest PV was determined for walnut oil (0.82 0.18 mEq O/kg oil) and carrot seed oil (0.87 0.21 mEq O/kg oil) oils. ConclusionFA composition of cosmetic oils in combination with data concerning their oxidative quality, is very important for determining their safe and effective use. It is very important to standardize and test the FA content in commercially available oils of cosmetic use. Resume ObjectifLes huiles ont ete utilisees en application cosmetique depuis l'antiquite. Avec l'interet croissant dans la formulation cosmetique strictement naturelle, il y a eu aussi un interet accru pour l'utilisation d'huiles obtenues a partir de noix, des herbes, de fruits et de graines de legumes. En raison d'un manque de bons rapports scientifiques sur les huiles vegetales cosmetiques disponibles en Pologne, le but de notre etude etait de caracteriser le profil des acides gras (FA) et la qualite oxydative des huiles vegetales non conventionnelle selectionnees, qui sont utilisees comme cosmetiques ou ingredients cosmetiques potentiels. MethodesLes huiles ont ete achetees dans des magasins de cosmetique bio a Varsovie (Pologne); le profil-FA a ete analyse par chromatographie en phase gazeuse avec detection a ionisation de flamme. L'indice de peroxydes (PI), le contenu en hydroperoxydes (PV) et en acides gras libres (AV) ont egalement ete determines. ResultatsLa qualite oxydative et la composition des huiles examinees en FA variaient considerablement parmi les huiles analysees. L'analyse typologique a revele trois groupes. Clusters S1 et S3 comprennent seulement une huile (Perilla et l'argousier, respectivement). L'huile de Perilla est caracterisee par sa teneur relativement faible en deux FA satures (8,5%) et FA monoinsatures (14,2%) et le montant beaucoup plus eleve de acides gras polyinsatures (73,5%) alors que dans l'argousier ces proportions sont inversees (acides gras satures et mono-insatures FA - 33,5% et 51,0% respectivement, et la plus faible quantite d'acides gras polyinsatures - 5,2%). Dans le pole S2 deux sous-groupes ont ete distingues et le contenu en l'acide linoleique (p = 0,0015), -linolenique (p = 0,0092) et acide oleique (p = 0,0015) a cause cette distinction. Le PI variait de 8,9 dans l'huile d'argousier a 135 dans de l'huile de Perilla. L'huile de Perilla et l'huile de pepins de framboise ont egalement ete caracterisees par la plus haute valeur de PV (225 +/- 14,9 mEq O / kg d'huile et 232 +/- 13,8 mEq O / kg d'huile, respectivement), tandis que la plus faible valeur PV a ete determinee pour l'huile de noix (0,82 +/- 0,18 mEq O / kg d'huile) et l'huile de graine de carotte (/ kg d'huile) des huiles de 0,87 +/- 0,21 mEq S. ConclusionLa composition en acides gras des huiles cosmetiques en combinaison avec les donnees relatives a la qualite de leur oxydation, est tres importante pour la determination de leur utilisation sure et efficace. Il est tres important de normaliser et de tester le contenu FA dans les huiles disponibles dans le commerce de l'usage cosmetique.

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