Relentless is an Amino Acid product. It has a 4:1:1 ratio of your Branch Chain Amino Acids. It also has 2 grams of Beta Alanine for buffering lactic acid out of your muscle and increased performance, 2 grams of Glutamine for muscle recovery and immune system support, 1.5 grams of Waxy Maize for an immediate glycogen fill and nutrient delivery, and 750mg of Nitrosigine. Nitrosigine is the capper to Relentless. It is a state of the art "Pump" ingredient. It is the best vasodialating ingredient available. Nitrosigine will enhance nutrient delivery by expanding the blood vessels and veins, oxidating the red blood cells, allowing the Amino Acids and other ingredients to be transported to the muscle as fast as possible. When you have this paired with the Waxy Maize, you have a home run. Why? Waxy Maize acts as a taxicab. It transports the ingredients to the muscle. However, it doesn't stop there and drop the ingredients off at the muscle. It forces itself into the muscle along with the ingredients and aminos, replenishing the glycogen (energy for your muscle) keeping your muscles full. The Nitrosigine will allow you to keep your pump all day as well.