WHAT IS D-PHENYLALANINE?
D-Phenylalanine is the dextrorotatory form of the amino acid Phenylalanine. The L-forms (Levorotatory) of amino acids are ones that are bioavailable and are for protein synthesis and regulatory function. The L and D forms are like mirror images of one another, however D-Phenylalanine is not absorbed into the body, but acts as an inhibiting agent to the enzymes that are responsible for the breakdown of endorphins, which control pain perception.