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Doctor's Best D-Phenylalanine

Protein Synthesis & Neurotransmitters Production!

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Doctor's Best D-Phenylalanine

Product Info.

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Serving Size: 1 Capsule
Size: 60 Veggie Caps
Servings - 60

Amount Per Serving
D-phenylalanine 500mg

Other Ingredients:
Hypromellose (vegetarian capsule), microcrystalline cellulose, magnesium stearate (vegetable source).

Recommended Use:
Adult use: Take 1 capsule daily on an empty stomach at least 20 minutes before meals, or as recommended by a nutritionally-informed physician. To ensure optimal phenylalanine absorption, avoid taking other amino acid supplements within 2-3 hours of intake.

Phenylalanine supplements should not be taken by children, pregnant, nursing, individual with phenylketonuria (PKU), high blood pressure, taking anti-psychotic medications or MAO inhibitors. Consult your physician before use. KEEP THIS PRODUCT AND ALL SUPPLEMENTS OUT OF THE REACH OF CHILDREN AND PETS.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.


Doctor's Best D-Phenylalanine - D-Phenylalanine is a non-protein amino acid that helps with mood and produces a steady state of calmness that produces a release of endorphins that help with exercise & mental recovery from workouts!

Functional Benifits

Functional Benifits

Necessary For Protein Synthesis & Production Of Neurotransmitters!

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. A small amount of D-phenylalanine may be converted to L-phenylalanine in the body.

Doctor's Best D-phenylalanine is a non-protein amino acid that acts as an inhibiting agent to enzymes that degrade enkephalins, naturally occurring peptides in the body that metabolize endorphins. Endorphins are neurotransmitters that play a key role in the function of the nervous system and are associated with feelings of pleasure. By limiting production of enzymes that brake down endorphins, the supplement can help support a healthy mood and normal functioning of the nervous system.

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