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Mangosteen peel and green tea leaves are natural antioxidants that have been widely used in the community. Usually, people use it as a tea drink. The aim of this study was to find the composition of green tea-mangosteen peel combination which has the highest antioxidant. The material used is a mixture of mangosteen peel and green tea leaves powder with a composition (92.5: 7.5); (95: 5) and (97.5: 2,5). The combination powder mixture was extracted by maceration method using ethanol solvent. Antioxidant tests were carried out using the DPPH method. The antioxidant activity is expressed as ES50. Gallic acid is used as a positive control. The results showed that gallic acid and extracts of the combination of mangosteen peel-green tea leaves had antioxidant activity with ES 50, respectively 3.025 μg/ml; 20.62 μg/ml; 33.175 μg/ml and 38.210 μg/ml. The combination of mangosteen peel-green tea leaves (92.5: 7.5) is a combination with the highest antioxidant activity. Keywords—mangosteen, green tea, combination, antioxidant, DPPH

Antioxidant Activity of Combination of Mangosteen Peel (Garcinia Mangostana) and Green Tea Leaves (Camellia Sinensis)