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Doctor's Best

Best D-Phenylalanine

Item: DB196

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500 mg 60 Veg Caps

  • 500 mg per capsule



  • Non-protein amino acid



  • Science-based nutrition


Doctor's 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 and a small amount of D-phenylalanine may be converted to L-phenylalanine in the body.

Lee Swanson, President

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If you are dissatisfied for any reason, we'll give you a full refund and pay return shipping. Lee Swanson, President of Swanson Health Products

Product Description:

Best D-Phenylalanine

  • 500 mg per capsule



  • Non-protein amino acid



  • Science-based nutrition


Doctor's 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 and a small amount of D-phenylalanine may be converted to L-phenylalanine in the body.

Product Label:

Best D-Phenylalanine

Supplement Facts

Serving Size 1 capsule

Servings per container 60 servings

  Amount per serving %Daily Value
D-phenylalanine 500 mg

† Daily Value not established.

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

Suggested Adult Use: Take 1 or 2 capsules daily, between meals.

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

  • Suitable for Vegetarians.
  • CONTAINS NOTHING OTHER THAN LISTED INGREDIENTS.
  • VEGGIE CAPS.

Terms and Ingredient Definitions

Best D-Phenylalanine

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