unclassified drug Article 225 controlled study 211 nonhuman 195 human 113 chemistry 93 plant extract 86 animal experiment 77 male 74 metabolism 69 Humans 67 Animals 66 human cell 66 antioxidant activity 60 animal model 59 mouse 57 animal 56 in vitro study 56 drug effect 53 animal tissue 51 enzyme activity 51 plant leaf 51 IC50 49 priority journal 49 rat 45 antioxidant 42 article 42 animal cell 41 protein expression 41 Plant Extracts 40