Emulsion products with natural antimicrobials are becoming increasingly popular for topical application. Mandelic Acid is interesting in cosmetics due to its potent exfoliating properties, which have driven advancements in skincare technologies. Essential oils have various properties, of which the most useful in cosmetics are those that do not cause irritation, smell pleasant, and have other beneficial properties such as antimicrobial effects. Emulsions with Mandelic Acid and essential oils from Satureja montana, Lemongrass, and Litsea cubeba were formulated and microbiologically tested for their preservative effectiveness. The effect of the treatments on skin condition was monitored by non-invasive diagnostic methods, such as hydration, transepidermal water loss, and pH value. Sensory analysis revealed that the matrix containing Mandelic Acid alone or combined with Litsea Cubeba Oil was the best-performing formulation, consistent with the compliant results of antimicrobial efficacy. The topical form of this cosmetic product has demonstrated excellent preservative activity and desirable biophysical efficacy on the skin.

Department of Environmental Protection Engineering Faculty of Technology Tomas Bata University in Zlín Vavrečkova 275 760 01 Zlín Czech Republic

Department of Fat Surfactant and Cosmetics Technology Faculty of Technology Tomas Bata University in Zlín Vavrečkova 5669 760 01 Zlín Czech Republic

Department of Polymer Engineering Faculty of Technology Tomas Bata University in Zlín Vavrečkova 275 760 01 Zlín Czech Republic

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