In addition, Zacho et al. [4] reported a larger association between MTHFR rs1801133 and stomach cancer among study populations without folic acid fortification (OR: 1.60, 95% CI: 1.36–1.88), as compared to those with fortification (OR: 1.15, 95% CI: 0.81–1.63), which is similar to our finding of a stronger association among individuals with lower plasma folate levels. The gene discussed is MTHFR; the disease is gastric cancer.