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For athletes, arginine AKG is beneficial because it helps to increase the growth of muscles and increases the dilation of blood vessels. If you exercise regularly and have more blood flowing to your muscles, your muscles will look bigger.
AAKG use is common among bodybuilders. Photo Credit TongRo Images/TongRo Images/Getty Images. Arginine alpha-ketoglutarate is a dietary supplement consisting of the amino acid arginine -- a building block of protein -- and alpha-ketoglurate, a compound that breaks down sugars and amino acids.