Source Naturals DLPA, 375 mg, 120 Tablets  (375 mg)

Dietary Supplement DL-Phenylalanine Supports An Alert State 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 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 associated with normal physiological processes. By obstructing the action of this enzyme, DPA may extend 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. Suggested Use 1 to 2 tablets 1 to 2 times daily. Other Ingredients Dibasic calcium phosphate, sorbitol, stearic acid, magnesium stearate, colloidal silicon dioxide, and modified cellulose gum. Warnings Contains phenylalanine. Not to be used by phenylketonurics, women who are pregnant, may become pregnant, or breastfeeding, or with antidepressant drugs such as MAOIs or SSRIs. If you have chronic high blood pressure, take after meals and/or consult your health care professional. Do not use if either tamper-evident seal is broken or missing. Keep out of the reach of children.