BackgroundD-Serine. an endogenous co-agonist of the N-methyl-D-aspartate (NMDA) receptor. is synthesized from L-serine by serine racemase (SRR). Given the role of D-serine in both neurodevelopment and the pathophysiology of schizophrenia. https://www.bekindtopets.com/special-deal-2025-Armada-Tantrum-Junior-Skis-with-Atomic-Colt-7-Bindings-super-save/