* Dietary Supplement * Athletic Series * Potassium & Magnesium Alpha-Ketoglutarate K-Mag KG is a combination of the essential minerals potassium and magnesium with alpha-ketoglutaric acid (AKG). Potassium, magnesium, and AKG all have important roles in the Krebs cycle, the body"s main energy production system. Potassium is important for muscle strength and glycogen formation, while magnesium helps store body energy as magnesium ATP (adenosine triphosphate, the body"s chief energy molecule). AKG combines with the harmful ammonia generated by intense muscle activity to create glutamine, an important energy fuel.