http://www.competitivecyclist.com/beetelite-neo-shot?s=a
I started using this product a couple years at the recommendation of another cyclist. Since then I have bought a juicer after watching what the Professional Cyclists Teams are doing.
The consumption of dietary nitrates through the supplementation of beetroot juice has become a hot topic in the world of endurance performance. Beetroot juice is especially high in nitrates and bacteria in the mouth convert nitrate into nitrite, which, when swallowed, enables the stomach to naturally produce nitric oxide.
Nitric oxide has many functions within the body including improving blood flow and energy metabolism. Research has shown that these benefits lower the oxygen cost of exercise. Team Sky and British Cycling were both early adopters of this supplement. The juice is available in concentrated form, which makes it relatively palatable and cheap. The protocol favoured by British Cycling is to consume 70-140ml of concentrated juice three hours before a race or key training session.