The results indicated that anti-HP treatment for 2 weeks and garlic or vitamin supplementation for 7 years can significantly reduce the risk of death due to gastric cancer for more than 22 years, and garlic supplementation showed favorable persistent effects on gastric cancer incidence and mortality during the extended follow-up of 14.7 years, which became apparent after approximately 12 years of supplementation (Li WQ. The gene discussed is HP; the disease is gastric cancer.