GPT and gastroesophageal reflux disease: Furthermore, no evidence of a causal link between GERD and the risk of ALT (IVW: OR = 1.007, 95% CI, 0.998–1.015, p = 0.123) and AST (IVW: OR = 1.004, 95% CI, 0.997–1.012, p = 0.246) in East Asian population was observed during this study.