Dietary nitrates from beetroot convert to nitric oxide in the body. This compound relaxes blood vessels, increasing blood flow and circulation. Athletes and active individuals use it to improve exercise performance and stamina. Many also take it daily to support cardiovascular health.
Beetroot supplements come as juice, powder, or capsules. A typical serving is taken 1 to 2 hours before a workout. Some people notice a harmless red color in urine or stool afterward. Those prone to kidney stones should be aware of the oxalate content.