A comprehensive review of 45 case-control studies and 11 cohort studies found that most published epidemiological studies provide positive evidence for an association between salt or salted food consumption and stomach cancer risk. This association was supported by experimental studies, which demonstrated that salt damages the stomach lining and causes lesions, potentially leading to stomach cancer.
Systematic Review and Meta-Analysis
A more recent systematic review and meta-analysis of case-control studies found that higher dietary salt intake increased the risk of gastric cancer, with a relative risk of 1.25 (95% CI: 1.10–1.41) for high salt intake and 1.20 (95% CI: 1.04–1.38) for moderate salt intake.