Chewing sugary gum after consuming nitrate-rich vegetables such as beetroot, spinach or kale may help support lower blood pressure, according to new research by scientists at King’s College London and the University of Reading.

The study suggests that chewing gum can help the body convert dietary nitrates into nitrites, a process linked to better blood flow and cardiovascular health. Researchers say the finding may help explain how certain everyday foods can influence heart health when combined with the right oral conditions.

Leafy green vegetables and root vegetables are rich in dietary nitrates, which are widely studied for their potential role in supporting healthy blood vessels. Once consumed, nitrates can be converted into nitrites by bacteria in the mouth before contributing to the production of nitric oxide, a compound that helps relax and widen blood vessels.

Researchers said this process can improve circulation and may contribute to reduced blood pressure. Lower blood pressure is associated with a reduced risk of serious cardiovascular events, including heart attack and stroke.

The scientists examined whether changes in saliva acidity could affect how efficiently nitrate is converted into nitrite. Their work followed earlier observations that some drinks could reduce saliva acidity and weaken the conversion process.

As part of the study, volunteers were given a beetroot juice shot and then asked to chew gum over several hours. Some participants chewed sugar-containing gum, while others used sugar-free gum.

The researchers found that sugar-containing gum appeared to increase nitrite production more effectively than sugar-free gum. They said the effect was linked to changes in the mouth that helped oral bacteria convert nitrate into nitrite.

Heart and blood vessel specialist Professor Andrew Webb said the study showed that even the type of chewing gum used alongside beetroot juice could influence how effectively the body processes dietary nitrate.

Experts noted that the findings do not mean sugary gum should be used as a treatment for high blood pressure. The effect reported in the study was modest, and people with hypertension should continue to follow medical advice and prescribed treatment.

Researchers said further studies are needed to understand whether the approach could have wider benefits, including for athletes and people seeking to improve vascular function through diet.