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Pomegranate (Punica granatum L.) is a fruit which has important pharmacological activities and has been attracting attention due to its important antioxidant activity, a significant feature in relation to cosmetics. Formulations containing different concentrations of an ethanolic extract of pomegranate (0.1, 1.0 and 5.0%) (w/w) as an antioxidant agent showed that this is an interesting alternative for the use of natural products with biological activity. The stability and rheology of semissolid systems containing an extract of this plant were evaluated. Preliminary stability studies showed greater physico-chemical stability of the formulation, and thus it was used in an accelerated stability study, as well the quantification of total phenolic compounds and the determination of antioxidant activity. It was observed that different concentrations of the extract did not significantly influence the stability. Moreover, the formulation was found to have better stability when stored at room temperature than under heated or cooled conditions. Formulations containing 0.1 and 5.0% of extract showed more stable rheological behavior, due to the absence of a solid/liquid transition in the rheogram. Tests confirmed the high phenolic content and antioxidant activity, demonstrating the potential of this plant for use in cosmetology as an antioxidant.

Extract of Punica granatum L.: an alternative to BHT as an antioxidant in semissolid emulsified systems