Cincau hijau (Cyclea barbata L.Miers) is a plant that has antioxidant activity. One of its secondary metabolites is flavonoid. The research studied the extract of Cycleabarbata leaves in 4 different gel formulas and investigated the accelerated stability for 3 months at room temperature and at 400C with a humidity of 75% and as well as evaluated the antioxidant activity using DPPH free radical scavenging assay. The results showed that all formulas showed different activity after 3 months storage at 400C. Formula 2 has stronger antioxidant activity than formula 4, formula 1 and formula 3 with IC50 value of 57.60; 59.22; 67.73 and 72.14 µg/mL respectively. All formulas demonstrated antioxidant activity and can be used to inhibit the premature aging of the skin.