Doctors 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 inhibit an enzyme enkephalinase that degrades enkephalins, which are naturally occurring substances in the body that belong to the class of compounds known as "endorphins."* D-phenylalanine slows the action of the enzymes carboxypeptidase A, endorphinase and enkephalinase that degrade endorphins. Endorphins are neurotransmitters your body releases that bind to specialized receptors that trigger two actions. This process blocks the neurotransmitters that cause you to experience pain. It also makes your brain release more of the neurotransmitter dopamine. D-phenylalanine has twice the endorphinase inhibitory effect of D, L-phenylalanine. Slowing down this endorphin-reducing mechanism may help diminish pain.*
Suggested Usage Take 1 or 2 capsules daily between meals or as recommended by a nutritionally informed physician.
Serving Size 1 Capsule
Servings Per Container 60
Amount Per Serving
% Daily Value***
*Daily Value Not Established ***Percent Daily Values are based on a 2,000 calorie diet
WarningsKeep out of reach of children. As with all dietary supplements, consult your healthcare professional before use. See product label for more information. Phenylalanine supplements should not be taken by individuals with phenylketonuria PKU children pregnant or lactating women people with high blood pressure and anyone taking anti-psychotic medications or MAO inhibitors.