Chewing gum after nitrate‑rich vegetables enhances blood‑pressure lowering effect

A study by researchers at King's College London found that chewing sugary gum after consuming nitrate‑rich foods such as beetroot juice increased saliva acidity, raised oral and plasma nitrite levels, and produced modest reductions in systolic and diastolic blood pressure (about 3 mmHg and 2 mmHg respectively). The effect lasted only a few hours.

Separate laboratory work from the University of Wollongong showed that the mechanical act of chewing boosts salivary flow, which helps transport nitrite to the stomach and improves nitric oxide production, a vasodilator that relaxes blood vessels. Both lines of research suggest that simple oral‑cavity interventions can augment the cardiovascular benefits of nitrate‑rich vegetables, though the authors caution that regular sugary‑gum consumption carries dental and metabolic risks and that longer‑term studies are needed.

The findings may be relevant for athletes using beetroot supplements and for broader strategies to support cardiovascular health, but further research is required to develop tooth‑friendly, low‑sugar methods to enhance nitrate conversion.