Some previous research suggests that inorganic nitrate, an ingredient in beet juice, can help increase delivery of blood and oxygen to working muscles and enable muscles to use oxygen more efficiently, particularly in people who are less fit or who do high-intensity exercise. “This makes it an attractive potential therapeutic approach for individuals with [peripheral artery disease] who have severely limited blood/oxygen supply to the lower limbs which severely reduces their function and makes everyday tasks require a vigorous effort,” said senior study author Jason David Allen of the Universi...