Arginine Alpha Ketoglutarate (AAKG) is the primary ingredient in most pre-workout. It’s an amino acid compound that’s been shown to help increase muscular ‘pump’ and vascularity as well as the delivery of blood, oxygen and nutrients to the working muscles during exercise. Arginine Alpha-Ketoglutarate (AAKG), plays a number of vital roles such as protein synthesis. The addition of the -Ketoglutarate compound helps improve the delivery of L Arginine in metabolic pathways. historically used by strength athletes and bodybuilders looking to increase muscle size and nutrient uptake, it’s more recently been used by endurance athletes too. This is because AAKG is known as a vasodilator, which means it widens the blood vessels within the body, and it’s theorised by experts that this vasodilation could allow more oxygen, blood and nutrients to be delivered to the muscles.