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Professional Supplements & Nutritional Products Since 1998

An amino acid supplement to support comfort and proper mood balance.*

DL-Phenylalanine from DaVinci Laboratories is an amino acid supplement to support comfort and proper mood balance.

DL-phenylalanine contains the essential amino acid L-phenylalanine, a natural mood enhancer, and D-phenylalanine.

DL-Phenylalanine may increase the production of phenylethylamine, which resembles the stimulant drug amphetamine. A phenylethylamine deficiency may cause poor mood states.

Phenylalanine amino acids may also inhibit the breakdown of endorphin, a hormone-like substance that might possibly account for the euphoria experienced by runners.

And DL-Phenylalanine may improve mood naturally in a third way: supporting norepinephrine production. Phenylalanine converts to the neurotransmitter norepinephrine, the first brain chemical deficiency believed to be involved with severe low mood states.

Supplement Facts:

Serving Size: 1 Capsule

Servings Per Container: 60

Amount per Serving:

Ingredient Amount % Daily Value
DL-Phenylalanine 750 mg *
*Daily Value not established.

Suggested Use:

As a dietary supplement, take 1 capsule with a meal, or as directed by your healthcare practitioner.

Other ingredients:

Vegetable cellulose, vegetarian leucine, silicon dioxide.

The color of this product may vary due to color variations of the natural ingredients.


  • Individuals with PKU (phenylketonuria) or who are pregnant or nursing should not use this product.
  • Keep out of reach of children.
  • Store in a cool, dry place.
*The Food and Drug Administration has not evaluated this statement. This product is not intended to diagnose, treat, cure, or prevent any disease.


All products listed on this website contain our most up-to-date formulas, ingredients, and serving sizes. Products may vary depending on the manufacture date.