Formulation of a hydrating cream containing Echinacea extract as a preservative and antimicrobial agent

In this study, an oil-in-water hydrating cream was formulated by emulsifying the oil and aqueous phases at 75 ± 2 °C. Echinacea extract was incorporated as a natural preservative and antimicrobial component to replace synthetic preservatives such as methylparaben and propylparaben. The prepared cream was evaluated through physicochemical characterization, microbial challenge testing, and stability assessments. Experimental results showed that the formulation possessed good homogeneity, high skin absorption capacity, and effective long-lasting hydration. The antimicrobial preservative efficacy test conducted over 28 days demonstrated significant bacterial reduction, confirming the antimicrobial functionality of Echinacea extract within the cream matrix. In addition, accelerated stability testing indicated that the product maintained its structural integrity, without phase separation or degradation, for up to six months. Overall, the study suggests that Echinacea extract can serve as a promising natural preservative while simultaneously contributing to skin compatibility and hydration performance, supporting the development of safer and more sustainable cosmetic formulations.