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 Suggested Use. 1 To 2 Tablets Daily Suitable For Vegetarians: Contains No Yeast, Dairy, Egg, Gluten, Corn, Soy Or Wheat. Contains No Sugar, Starch, Preservatives Or Artificial Color, Flavor Or Fragrance Over 40 Years Of Trust. Source Naturals Was Created In 1982 By Ceo Ira Goldberg To Support Everyoneã¢ÂS Potential To Enjoy Optimal Health Manufactured In The Usa. Manufactured In Scotts Valley, Ca, Under The Good Manufacturing Practices (Cgmps) Established By The Us Food And Drug Administration (Fda) 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
