Propolis is a natural resinous substance collected by honey bees from buds and exudates of trees and is used by bees as a glue, general-purpose sealer and draught extruder for beehives. Known in folk medicine since ancient times, propolis has attracted much attention in recent years as a useful ingredient applied in medicine, domestic products, and food products since it possesses various biological properties including antimicrobial, antioxidative and antiulcer properties. In this study, ethanolic extracts of propolis (EEPs) samples from different part of the United States were determined for antioxidant activity using 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay and correlated with its phenol content using Folin Ciocalteu’s reagent. Among the twelve samples used, those obtained from California and Ohio showed strongest antioxidant activity and highest phenol content.

Antioxidant activity and phenolic content of bee propolis from the United States

ACS Spring 2022

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