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D-Phenylalanine 500 mg

Doctor's BestUpdated April 2026

Product Information

Form
Capsule
Servings Per Container
60
UPC
7 53950 00110 7
Product Type
Amino acid/Protein
DSLD Entry Date
2022-06-16

Target Groups

VeganVegetarianAdult (18 - 50 Years)Gluten Free

All Ingredients

IngredientAmount% DV
D-Phenylalanine500 mg

† Daily Value not established.

Label Statements

Formula re: Contains

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 break down endorphins, the supplement can help support a healthy mood and normal functioning of the nervous system.

Formulation re: Other

Helps support healthy mood Helps support endorphin metabolism Helps support neurotransmitter function

FDA Disclaimer Statement

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

Brand IP Statement(s) re: (c), (TM), (SM)

Science-Based Nutrition

FDA Statement of Identity

Dietary Supplement

Formulation re: Vegetarian/Vegan

Vegan

Suggested/Recommended/Usage/Directions

Suggested 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 consumption.

Precautions re: Pregnant or Nursing or Prescription Medications

Warning: Phenylalanine supplements should not be taken by children, pregnant, nursing, individuals with phenylketonuria (PKU), high blood pressure, taking anti-psychotic medications or MAO inhibitors. Consult your physician before use.

Precautions re: Children

Warning: Phenylalanine supplements should not be taken by children, pregnant, nursing, individuals with phenylketonuria (PKU), high blood pressure, taking anti-psychotic medications or MAO inhibitors.

Formulation re: Does NOT Contain

Non-GMO Gluten Free Soy Free

Storage

Store in a cool dry place.

Supplement Facts Panel

Supplement Facts
Serving Size 1 Veggie Capsule(s)
Servings Per Container 60
Amount Per Serving% Daily Value*
D-Phenylalanine
500 mg

* Percent Daily Values are based on a 2,000 calorie diet.

† Daily Value not established.

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