What Is D-Aspartic Acid? D-aspartic acid is an amino acid uséd in the biosynthesis of protein. Because DAA is commonly found in mammals, it is considered a nonessential amino acid. However, many men supplementD-aspartic acid due to its positive effects on sexual health and athletic performance. D-Aspartic Acid Benefits* D-aspartic acid has been linked to the process of producing Luteinizing Hormone (LH), which plays a role in synthesis of testosterone.D-aspartic acidmay also help boost energy, promote sexual health, help libido, and support the brain. ⚡ BOOSTS ENERGY* - D-Aspartic Acid is a precursor to the amino acid aspartic acid. Aspartic acid is an excitatory neurotransmitter that can help boost energy levels, endurance, and athletic performance.