Stimulant-based powder mixing L-citrulline and betaine anhydrous for vasodilation, plus caffeine and L-theanine for sustained energy and focus. One scoop (~$1 per serving at 10-serving size) delivers the tingling from beta-alanine, zero carbs, vegan, made in a cGMP facility.
Multiple RCTs support the individual ingredients: caffeine improves strength and endurance performance, citrulline malate enhances blood flow and reduces fatigue, and beta-alanine delays muscular fatigue in high-intensity efforts. The combination is mechanistically sound and aligns with established sports-nutrition research, though the specific Nitrosurge formulation itself has not been formally tested in a dedicated RCT.
Nitrosurge is a pre-workout supplement containing caffeine, beta-alanine, citrulline malate, and other compounds. Caffeine blocks adenosine receptors to increase alertness and reduce fatigue perception. Citrulline malate is converted to arginine, which boosts nitric oxide (NO) production to improve blood flow and nutrient delivery to muscles. Beta-alanine buffers lactic acid accumulation during high-intensity exercise, potentially delaying fatigue.
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Randomized trial
“BACKGROUND: Caffeine is one of the most popular ergogenic aids consumed by athletes.”
“The primary purpose was to determine the separate and combined effects of creatine and caffeine supplementation during resistance training on body composition and muscle performance in trained young adults.”
“BACKGROUND: This study assessed the impact of acute caffeine intake on muscular strength, power, and endurance performance between resistance-trained male and female individuals according to load in upper- and lower-body exercises.”
“OBJECTIVES: In official judo competitions, athletes usually engage in 5-7 matches in the same day, performing numerous high-intensity efforts interspersed by short recovery intervals.”
While individual ingredients are well-studied, the proprietary blend's exact dosages and synergistic effects are not independently verified. Efficacy depends on dose—many pre-workout products underdose key compounds. Individual response varies widely; some users report minimal benefit. The supplement industry is loosely regulated, so third-party testing of actual content is advisable. Caffeine tolerance develops quickly, reducing long-term benefit.
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