ALLMAX Citrulline Malate 2: 1 300 gram, 300 gram CITRULLINE MALATE improves training intensity, endurance and speed of recovery. It performs this through 5 main functions: Increases blood Arginine levels (gram for gram at double the level of Arginine), Increases endothelial Nitric Oxide (NO) levels thereby improving vascular function and blood flow, Improves kidney bicarbonate reabsorption providing a powerful buffer against increg muscle acidification during intense training, Detoxifies fatigued muscle tissue by removing ammonia (a toxin that can increase 3-fold during intense training) and Rapidly replenishes PCr (phospho-creatine) stores, PCr is a key storage of energy muscles tap into. Aside from assisting with delivery and absorption, the Malate has a critical function in the TCA (or Krebs) cycle that produces energy within the mitochondria. Specific research has shown a 34 increase in the rate of oxidative ATP, 20 increase in post-exercise phosphocreatine recovery and significant reduction in the sensation of fatigue. The fact is that most of the research on performance enhancement has been done on Citrulline Malate not just Citrulline on its own. Together with Malate, Citrulline has enhanced stability as a molecule and Malate has been shown in research to have the ability to play a role in Nitric Oxide production. Malate plays a key role in the TCA (or Tricyclic Acid) cycle (also known as the Krebs Cycle) that produces energy in the body. While it is true that Citrulline is the true "driver" of the two and that Malate is more prevalent in the body, so Citrulline Malate 2:1 provides the best of both worlds, stability and effectiveness. ALLMAX Nutrition - Arginine HCl - Maximum Strength Absorption - Pharmaceutical Grade - 400 Gram Arginine is considered a semi-essential amino acid, produced normally in the body, but sometimes your body needs more than what is available. Those looking to enhance athletic performance or increase lean muscle mass, it is difficult to derive the amount required by the body for optimal results from food sources.Product 2: Precursor to the Production of Creatine. Product 2: Stimulation of the Release of Growth Hormone. Product 2: Precursor for the Synthesis of Nitric Oxide (NO). Product 1: Improves recovery. Product 1: Elevates muscle protein and creatine synthesis. Product 1: Optimizes BCAA utilization during workouts. Product 1: Increases growth hormone.