“Our project of a large pool of case–control studies supports a protective effect of total folate intake on OPC risk.”
“We found an inverse association between total folate intake and overall OPC risk (the adjusted OR for the highest vs. the lowest quintile was 0.65, 95% CI: 0.43–0.99), with a stronger association for oral cavity (OR = 0.57, 95% CI: 0.43–0.75).”