Back in 2007, a research team from Harvard School of Public Health in Boston, MA, were the first to report strong evidence on a link between gum disease and pancreatic cancer. The type of gum inflammation associated with pancreatic cancer in the study was periodontitis, which affects the tissue that support the teeth and can cause loss of bone around the base of the teeth.

The other main kind of gum disease – gingivitis; where the tissue around the teeth becomes inflamed – was not linked to increased cancer risk. However, gingivitis can lead to periodontitis if persistent. The follow-Up study, which involved a cohort of more than 51,000 men and began collecting data in 1986, the Harvard researchers found that men with a history of gum disease had a 64% increased risk of pancreatic cancer compared with men who had never had gum disease.