Arginine Alpha-Ketoglutarate, or AAKG for short, has become popular for its ability to increase production of the messenger molecule Nitric Oxide (NO). The key benefit of NO to athletes, is it's ability to relax smooth muscle, thereby increasing blood flow to the muscles.
Arginine is also of interest to athletes as the most effective of the Growth Hormone releasing amino acids.
AAKG is most often taken by power athletes and bodybuilders prior to training, to increase Nitric Oxide levels - providing increased muscle pump (which may increase nutrient transport to muscles), plus greater strength, energy and endurance. AAKG may also be suitable as a night time supplement, taken on an empty stomach before bed, alone, or in conjunction with other GH releasers.