Doctor’s Best D-phenylalanine is a non-protein amino acid related to the essential amino acid Lphenylalanine.
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."

How Does it Work?
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.

Benefits:
• Doctor’s Best D-phenylalanine is a non-protein amino acid related to the essential amino acid Lphenylalanine.
• D- and L-phenylalanine are structural mirror images of each other.
• D-phenylalanine is reported to inhibit an enzyme that degrades enkephalins, which are naturally occurring
substances in the body that belong to the class of compounds known as "endorphins.”
• Helps extend life of endorphins and enkephalins
• Helps improve comfort levels associated with pain
• Helps increase dopamine levels
• Gluten Free, Non-GMO, Vegetarian

Caution: Phenylalanine supplements should not be taken by individuals with phenylketonuria (PKU), children, pregnant or
lactating women, people with high blood pressure, anyone taking anti-psychotic medication or MAO inhibitors.

Dose (adults):
Take 1 or 2 capsules daily, between meals

Ingredients (per 1 capsule): D-Phenylalanine 500mg

Caution: Phenylalanine supplements should not be taken by individuals with phenylketonuria (PKU), children, pregnant or
lactating women, people with high blood pressure, anyone taking anti-psychotic medication or MAO inhibitors.