MPO and gastric ulcer: Boyacioglu et al. conducted an RCT to investigate the prophylactic effects of lycopene against indomethacin-induced gastric ulcer in rats (Boyacioglu et al., 2016).The results showed that pre-administration of lycopene could protect against DNA damage induced by indomethacin, possibly by improving the superoxide dismutase (SOD) activity, glutathione (GSH) level and decreasing catalse (CAT) activity, malondialdehyde (MDA) level and myeloperoxidase (MPO) activity, thus exerting its antioxidative effects.