Phenylalanine / D-Phenylalanine / L-Phenylalanine

Doctor's Best D-Phenylalanine 500mg 60 CapsulesWhat is D-Phenylalanine? Doctor’s Best D-phenylalanine is a non-protein amino acid related to the essential amino acid L-phenylalanine. D- and L-phenylalanine are structural mirror images of each other. D-phenylalanine is reported to inhi..