Antioxidant and free radical scavenging properties of Dacryodes edulis leaf and bark extracts

Abstract

Photoaging is of the increase in sunny geographical areas due to long-term effects of repeated exposure to ultra violet (UV) radiation. The antioxidant properties of Dacryodes edulis leaf and bar extracts were determined using the 2, 2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging assay. All the ethanol and aqueous extracts of D. edulis: Uyo leaf (IC50 = 148.43±0.04 μg/cm3 and 161.72±1.02 μg/cm3), Uyo bark (IC50 = 152.29±2.04 μg/cm3 and 171.34±0.04 μg/cm3), Ikom leaf (IC50 = 153.45±0.05 μg/cm3 and 142.08±0.01 μg/cm3) and Ikom bark (IC50 = 126.37±0.02 μg/cm3 and 129.60±5.07 μg/cm3) respectively, except the aqueous extract of D. edulis-Uyo bark, significantly (p