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Dibasic calcium phospate, stearic acid, sorbitol, magnesium stearate, silica, and modified cellulose gum.
DL-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 amino acids that can be utilized in its D form). Researchers believe that D-phenylalaine (DPA) inhibits the action of an enzyme that breaks down endorphins and enkephalins. These are proteins that bind to opoid receptor sites in the brain, therby influencing the perception of discomfort. By obstructing the action of this enzyme, DPA may extended the life of endorphins and enkephalins and their positive influence on comfort levels. L-Phenylalanine is the precursor to two neurotransmitters that help support an alert state.