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Product Details

L-phenylalanine is an essential amino acid used by cells to synthesize proteins.  Because L-phenylalanine is an essential amino acid, it is not synthesized in the human body and must be supplied by dietary intake or supplementation.

L-phenylalanine is necessary for healthy function of the nervous system. This is because L-phenylalanine is utilized by the body to produce L-tyrosine, a biochemical precursor in the synthesis of the neurotransmitters, epinephrine, norepinephrine and dopamine, and the skin pigment melanin.

Tested by Accredited 3rd Party Labs

This PureBulk product is manufactured in a cGMP certified and registered facility. PureBulk's supplements are tested by accredited third party labs in the USA to ensure their identity, purity and potency. To receive a copy of these test results or any other PureBulk supplement please fill out the COA request form found here.

Supplement Facts & Directions

Supplement Facts

Serving Size: 500 milligrams
Servings Per Container: Varies
Amount Per Serving % Daily Value*
L-Phenylalanine 500mg

* Percent Daily Values are based on a 2,000 calorie diet.
† Daily Value Not Established
‡ These supplement facts may vary from the product you recieve.    Please call for exact numbers.

Other Ingredients: None


Free of:  Soy, Dairy, Yeast, Gluten & Additives.

Directions:  As a dietary supplement, take 500mg (level unpacked 1/8 tsp) up to three times daily between meals, or as directed by a physician.

Warning: If you are pregnant, nursing, taking any medications or have any medical condition consult your physician before use. DO NOT use with prescription anti-depressants and not to be used by phenylketonurics. Keep out of reach of children. Store in a cool, dark & dry place.

*NOTE: 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.