Formulation and Investigation Antioxidant of O/W Cream Containing Euphorbia hirta L. Herb Extract

Abstract

The herb extract of Euphorbia hirta L. have been reported as sources of inexpensive antioxidant that can be used as potential cosmetic product. Therefore, the aims of this study were to formulate E. hirta L. extract loaded cream and to assess the antioxidant activity of loaded cream. First, E. hirta L. was prepared with maceration process using water as solvent (1:5). Afterwards, the obtained extract was subjected to a lyophilisation process. The extract was tasted for antioxidant activity using 2,2-diphenyl-1-picrylhydrazyl (DPPH) for suitable concentration of the extract incorporated into the cream, which was 10%w/w. The cream was formulated as o/w emulsion and stearic acid was selected as an emulsifier. The extract loaded cream was tested pH, viscosity, and antioxidant. The freshly prepared extract loaded cream was dark green and no phase separation was observed after centrifugation at 3,000 rpm for 30 min. They had acidic pH (4.4-5.1), considered acceptable for skin application, especially in skin face. The DPPH measurement revealed that the formulation had potential antioxidant activity with %SCV more than 80% at 100 µg/mL. In conclusion, topical o/w cream containing extract was successfully prepared with substantial antioxidant activity and was displayed a potential use in cosmetic formulations, especially antiaging products.

Keywords

• euphorbia hirta extract
• cream
• antioxidant
• topical delivery