Nitric oxide is
naturally occuring in the body, as a byproduct of amino acid breakdown.
Nitric oxide allows formore blood and nutrients to be brought to
muscles, and has been shown to be boosted when body builders and weight
lifters workout, and increased levels give an extra pump. Caffeine
added to the nitric oxide works in several ways. One way is simply by
being a stimulant, giving you extra energy to get the most out of a
workout. Caffeine is also being explored as an enhancement to nitric
oxide by slowing arginase’s effectiveness. Arginase decreases the
levels of nitric oxide within the body, and so caffeine may make the
nitric oxide boost last longer.