Microbiological quality and efficacy of preservatives in marigold-based skin care products
Authors:
Tatjana Stević
(Institute for Medicinal Plant Reasearch „Dr Josif Pančić“, Belgrade, Serbia)
,
Nemanja Krgovic
(Institute for Medicinal Plant Reasearch „Dr Josif Pančić“, Belgrade, Serbia)
,
Jelena Mudrić
(Institute for Medicinal Plant Reasearch „Dr Josif Pančić“, Belgrade, Serbia)
,
Nada Cujic Nikolic
(Institute for Medicinal Plant Reasearch „Dr Josif Pančić“, Belgrade, Serbia)
,
Ana Žugić
(Institute for Medicinal Plant Reasearch „Dr Josif Pančić“, Belgrade, Serbia)
,
Dubravka Bigović
(Institute for Medicinal Plant Reasearch „Dr Josif Pančić“, Belgrade, Serbia)
,
Tea Ganić
(Institute for Medicinal Plant Reasearch „Dr Josif Pančić“, Belgrade, Serbia)
,
Katarina Šavikin
(Institute for Medicinal Plant Reasearch „Dr Josif Pančić“, Belgrade, Serbia)
Abstract
The microbiological stability of cosmetic products is crucial, especially in products with high water content, such as creams. Therefore, preservatives are used in order to protect consumers from harmful pathogens that would otherwise invade the cosmetics. Despite their function, the addition of preservatives can be considered controversial in the cosmetics industry. Parabens are frequently used synthetic preservatives in various industries. According to regulatory directives concerning cosmetics (Cosmetic Directive by the European Commission) usage of some parabens (methylparaben, propylparaben, butylparaben, and ethylparaben) is safe and permitted in allowed concentrations. On the other hand, the European Commission prohibited the use of isopropylparaben, isobutylparaben, phenylparaben, benzylparaben and pentylparaben. Therefore, a comprehensive stability study was conducted to evaluate the influence of paraben-based preservative (Gujsol-1®, INCI name: Phenoxyethanol, Methylparaben, Ethylparaben, Propylparaben, Butylparaben) and potassium sorbate in order to preserve plant extracts-based skin-care products, Day and Night creams with marigold extract. Previously, mentioned skin-care products were preserved with the preservative Dekaben C®, which contained paraben mixture with banned isobutylparaben. All tested formulations showed favorable texture and sensory characteristics, desirable mild acidic pH values, satisfactory physical stability and appropriate microbiological quality at the initial point, as well as after storage at elevated temperature or at cyclic stress test conditions and at room temperature during two years. In addition, both preservatives significantly reduced the number of inoculated microorganisms during the challenge test. It can be concluded that potassium sorbate in plant-based creams could be an efficient alternative to paraben-based preservatives.
Keywords: plant-based cosmetics, marigold, parabens, challenge test, storage stability
How to Cite:
Stević, T., Krgovic, N., Mudrić, J., Cujic Nikolic, N., Žugić, A., Bigović, D., Ganić, T. & Šavikin, K., (2023) “Microbiological quality and efficacy of preservatives in marigold-based skin care products”, Lekovite Sirovine 43(1), 1-7. doi: https://doi.org/10.61652/leksir2343e172s
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