Stimulants can have several side effects, including a feeling of nervousness, anxiety, and difficulty sleeping. This is particularly true for those who are sensitive the effects of stimulants, such as caffeine. For those who wish to avoid the possibility of these negative side effects, but still get their maximum pump and muscle growth, stimulant-free nitric oxide with creatine is a good supplement. Nitric oxide delivers enhanced blood flow to the skeletal muscles, and creatine works with the added oxygen and nutrients to build muscle more quickly and slow the deterioration of the muscles you have worked so hard to build after a workout.
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