Evidence Level
Strong
Beetroot juice is one of the most thoroughly studied ergogenic aids in endurance sports. The nitrate-nitrite-NO pathway provides an oxygen-independent route to nitric oxide production that complements the classical L-arginine pathway. Research consistently shows beetroot reduces the O2 cost of exercise and improves endurance performance by 1-3%. Notably, effects are more pronounced in recreational athletes than elite athletes, possibly because elite athletes already have optimized NO production. The blood pressure benefits add a significant health dimension beyond athletic performance.