GSR and gastric ulcer: In addition, myrcene increased glutathione along with other antioxidant enzymes such as glutathione peroxidase (GPx) and superoxide dismutase, thereby preventing oxidative damage and protecting brain tissue (99).The effects of orally administered β-myrcene (7.5 mg/kg bw; 55 μmol/kg bw) against ethanol-induced gastric ulcers in male Wistar rats is mediated through antioxidant effects via increased levels of GPx, glutathione reductase (GR) and total glutathione in gastric tissue (98).