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Tetragonula iridipennis is a species of bee from the Apidae family. Its honey is known as an anticancer by the local community in Samarinda, East Kalimantan, Indonesia. However, research on propolis of T. iridipennis from East Kalimantan is rarely conducted. This research was carried out to investigate the antioxidant activity of propolis of T. iridipennis. The propolis was collected from a villager at Lempake subdistrict, Samarinda city, East Kalimantan province, Indonesia. The antioxidant activity was evaluated using a 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging assay, and ascorbic acid was taken as a standard. The propolis’s DPPH scavenging activities were high but lower than ascorbic acid as a positive control. However, it can be concluded that the propolis of T. iridipennis from East Kalimantan can be used as an antioxidant agent.

DPPH-Scavenging Activity of Propolis of Tetragonula iridipennis from East Kalimantan