Home > Manufacturers > Now_Foods > Phenylalanine, 120 caps / 500 mg Phenylalanine, 120 caps / 500 mg Phenylalanine, 120 caps / 500 mg NF-517 Your Price: $8.99 Regular: $14.99 You Save: $6.00 Quantity: Description: L-Phenylalanine is an essential, nine-carbon amino acid and is a precursor to the amino acid tyrosine. Because tyrosine is necessary for the synthesis of proteins and the production of the neurotransmitters dopamine and norepinephrine, phenylalanine is an extremely important nutrient that must be obtained through the diet or supplementation. The Inside Scoop: Free of: sugar, salt, starch, yeast, wheat, gluten, corn, soy, egg, milk or preservatives. Serving Size: 1 Capsule Servings Per Container: 120 Ingredient Details: Gelatin (capsule). L-Phenylalanine 500 mg Suggested Use: As a dietary supplement, take 1 capsule, 1 to 3 times a day as needed, preferably between meals. Warnings: Persons with high blood pressure should consult a physician before using.