Abstract

Nowadays, natural dyes are expected by the cosmetic and food industries. In contrast to synthetic dyes, colorants derived from natural sources are more environmentally friendly and safer for human health. In this work, plant extracts from Gomphrena globasa L., Clitoria ternatea L., Carthamus tinctorius L., Punica granatum L. and Papaver rhoeas L. as the natural and functional dyes for the cosmetics industry were assessed. Cytotoxicity on keratinocyte and fibroblast cell lines was determined as well as antioxidant and anti-aging properties by determining their ability to inhibit the activity of collagenase and elastase enzymes. In addition, the composition of the extracts was determined. The obtained extracts were also applied in face cream formulation and color analyses were performed. It has been shown that the obtained extracts were characterized by no cytotoxicity and a high antioxidant potential. The extracts also show strong ability to inhibit the activity of collagenase and moderate ability to inhibit elastase and provide effective and long-lasting hydration after their application on the skin. Application analyses showed that the extracts of P. rhoeas L., C. ternatea L. and C. tinctorius L. can be used as effective cosmetic dyes that allow for attainment of an intense and stable color during the storage of the product. The extracts of P. granatum L. and G. globasa L., despite their beneficial effects as active ingredients, did not work effectively as cosmetic dyes, because cosmetic emulsions with these extracts did not differ significantly in color from emulsions without the extract.

Highlights

  • The sustainable products idea is currently present in every aspect of human life

  • The undeniable advantage of these raw materials is the wide spectrum of biological activity that has been proven in this work, thanks to which they can be an ingredient that gives cosmetics a characteristic color, and can act as bioactive ingredients

  • The antioxidant and cytoprotective properties of the extracts depend on the concentration tested, but the highest cell proliferation capacity is shown by extracts from P. rhoeas L. and P. granatum L

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Summary

Introduction

The sustainable products idea is currently present in every aspect of human life. Food, pharmaceuticals, clothing, and other everyday products are produced at an increasing rate in accordance with the principles of sustainable development. Many of them are characterized by high irritant potential to the skin and have a negative effect on the environment [1,3,7] In this case, creating a sustainable cleansing cosmetic requires the use of additional ingredients to reduce the negative interactions of the surfactants with the skin or gentle surface active agents with the low irritant potential [12,13,14,15,16,17,18,19]. Both methods produce a significantly higher price of the finished product

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