Source Naturals, DL Phenylalanine, 375mg, 120 ct Bone Health a registered trademark of ABCO

a registered trademark of ABCO Laboratories

It has been widely used since the ancient Greek and Roman civilizations

Its bioactive form

L-Cysteine

and has been the subject of scientific research in Europe over the past 20 years

Source Naturals, DL Phenylalanine, 375mg, 120 ct Bone Health a registered trademark of ABCODL Phenylalanine, or DLPA, is a 50 50 mixture of the D and L forms of the amino acid phenylalanine (phenylalanine is one of the few aminos that can be utilized in its D form). Researchers believe that D phenylalanine (DPA) inhibits the action of an enzyme that breaks down endorphins and enkephalins. These are proteins that bind to opioid receptor sites in the brain, thereby influencing the perception of minor discomfort that is associated with normal