antioxidant activity 118 nonhuman 74 antioxidant 70 controlled study 64 unclassified drug 60 Antioxidants 55 Article 51 plant extract 45 chemistry 41 animal experiment 34 Animals 33 male 32 plant leaf 32 human 31 Antioxidant activity 30 animal 29 Plant Extracts 27 rat 27 animal model 26 animal tissue 25 article 25 drug effect 23 Antioxidant 22 oxidative stress 21 phenol derivative 21 Male 20 DPPH radical scavenging assay 19 antiinflammatory activity 19 priority journal 19 superoxide dismutase 19