D Aspartic Acid (D-AA) is a powerful testosterone booster. It helps testosterone synthesis, primarily in the central brain, where it stimulates luteinizing hormone (LH) and growth hormone (HGH), which tells the testes to make more testosterone. That’s supported by a 2009 study, which found D-AA boosted testosterone in 20 out of 23 guys by up to 43% after just 12 days.
D-ASPARTIC ACID – 2300MG PER SERVING
