D-Aspartic Acid is a naturally occurring amino acid that has been shown in clinical studies to aid in increased testosterone production in conjunction with a healthy diet and intense exercise. Maximize your recovery ability by optimizing your body’s hormonal environment, allowing muscle cells to recovery faster. Our D-Aspartic Acid is zinc fortified, also shown to help natural testosterone levels and is also Informed Choice certified, so you know it’s banned substance tested. It can be taken alone, or stacked with other supplements including pre-workout powders, creatine, glutamine or BCAAs. May be used by adult athletes of all ages.