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Average retail price per pound: $1.02

Beets are rich in immune-boosting vitamin C, fiber, and essential minerals like potassium, which is important for healthy nerve and muscle function, and manganese, which helps keep your bones, liver, pancreas and kidneys strong. This powerful food also contains the B vitamin folate, which helps reduce the risk of birth defects. It is a great source of naturally occurring nitrates, which is important for athletes and active people. Beetroot supplementation has been reported to reduce blood pressure and avert oxidative stress.