Beetroot shows it can provide a competitive edge when playing sport. Evaluating the performance effects of foods that are thought to have a beneficial effect on aerobic performance, researchers found that beetroot, grapes, sour cherries, and pine bark extract, which contribute to nitric oxide availability in the body, boost endurance exercise performance. The meta-analysis evaluated the effect of consuming nitrate-rich foods (typically green leafy vegetables), foods that contain polyphenols (such as berries, cherries and cocoa), and L-Citrulline (found in watermelon) on exercise endurance performance. The study found that the nitrate levels contained in beetroot, which have been shown to boost...