NutraKey products are Pharmaceutical grade ultra-pure for maximum bioavailability. Pure amino acid, HPLC verified. Energy & Fat Loss. Enhance Metabolism Improves Exercise Capacity. Acetyl-L-Carnitine is a stabilized & more absorbable form of the amino acid L-Carnitine. Acetyl-L-Carnitine plays an important role in protecting & supporting brain & muscle function. As an antioxidant, Acetyl-L-Carnitine protects neurons from damage caused by superoxide radicals. Improves exercise capacity and fat loss: Acetyl L-Carnitine facilitates the metabolism of fatty acids for energy generation. A greater reliance on fat for energy can result in a sparing of muscle glycogen, an enhancement of exercise performance and a reduction in stored body fat. Acetyl L-Carnitine has profound effects on endurance and exercise performance by reducing the respiratory exchange ratio and reducing lactic acid accumulation in muscles extending exercise capacity before fatigue. Carnitine comes in both L- and D-carnitine forms. However, only the L- form is biologically active. The D- form is completely inactive and in large quantities and particular conditions, the D- form may inhibit the utilization of L-carnitine. NutraKey L-Carnitine supplements contain no synthetic D-Carnitine or DL-Carnitine. D-Carnitine and DL-Carnitine are less effective than L-Carnitine. D-Carnitine and DL-Carnitine are not recommended because of their adverse physical side effects. Benefits of Acetyl L-Carnitine: Essential in energy metabolism, May enhance cognition, Involved food metabolism into energy, May significantly reduce severity of depressive symptoms, Significant improvements in exercise performance, Profound effects on endurance.