Formulation of Antioxidant Gel Biocosmetic Made of Cinnamon Bark Extract

Free radicals can damage collagen in the skin, which accelerates premature aging. Cosmetic preparations containing antioxidants are needed to slow down the premature aging process. Cinnamon bark is known to be able to fight free radicals due to the presence of cinnamaldehyde which is an antioxidant compound. Cinnamon bark extract is made into a gel preparation to make it easier to apply to the skin. This study aimed to determine the antioxidant activity of cinnamon bark extract in gel preparations. The extract was formulated in a gel with concentrations of 0.5%, 1%, and 2%. The gel’s physical property evaluation included the tests of organoleptic, homogeneity, pH, spreadability, adhesion, viscosity, and antioxidant. The results indicated that adding different concentrations of the cinnamon bark extract did not show a significant difference in the evaluation of the gel’s physical properties, which were the tests of organoleptic, pH, homogeneity, spreadability, adhesion, and viscosity. The cinnamon bark extract had a moderate antioxidant activity with an IC 50 value of 209.84±3.1. Each formula showed inactive antioxidant activity with IC 50 >500 ppm.