Bullet Points : 1 > An Essential Amino Acid. Phenylalanine Is First Converted To Tyrosine, Which Becomes L-Dopa, Which Converts To Norepinephrine, A Key Neurotransmitter And An Adrenal Hormone 2 > Suggested Use. 1 To 2 Tablets Daily 3 > Well Made Supplement: Contains No Yeast, Dairy, Egg, Gluten, Corn, Soy Or Wheat. Contains No Sugar, Starch, Preservatives Or Artificial Color, Flavor Or Fragrance 4 > Over 40 Years Of Trust. Source Naturals Was Created In 1982 By Ceo Ira Goldberg To Support Everyoneã¢ÂS Potential To Enjoy Optimal Health 5 > Manufactured In The Usa. Manufactured In Scotts Valley, Ca, Under The Good Manufacturing Practices (Cgmps) Established By The Us Food And Drug Administration (Fda) Description : Dietary Supplement. Free Form. An Essential Amino Acid. L-Phenylalanine, An Essential Amino Acid, Is A Precursor Of The Amino Acid Tyrosine, And A Whole Series Of Neurotransmitters And Hormones
