D-Aspartic Acid D-aspartic acid is an amino acid present in neuroendocrine tissues of invertebrates & vertebrates, including humans. D-aspartic acid is a physiological amino acid occurring principally in the pituitary gland & testes & has a role in the regulation of the release & synthesis of LH (Luteinizing hormone) & testosterone in humans. Reservetrol Resveratrol, a compound found in the skin of red grapes & a potent antioxidant, may provide support in balancing the male hormonal environment towards a potentially advantageous state.