Allergy Research Free Aminos is a formulation of 17 naturally occurring amino acids in their free forms. It includes 9 essential amino acids, as well as 5-L-Hydroxytryptophan (5-HTP). This formula does not contain L-tryptophan, 5-HTP is in the same metabolic pathway as L-tryptophan and is the immediate precursor to serotonin and melatonin. This formulation is appropriate for food-sensitive individuals.Suggested use:As a dietary supplement, 1 or 2 capsules one to three times daily between meals, or as directed by a healthcare practitioner.Ingredients:Serving Size; 2 capsulesServings per container; 50Amount per serving: 5-L-Hydroxytryptophan; 20 mg L-Alanine; 82 mg L-Arginine; 124 mg L-Cysteine; 28 mg L-Cystine; 124 mg L-Glutamine; 56 mg L-Glycine; 56 mg L-Histidine; 98 mg L-Isoleucine; 138 mg L-Leucine; 138 mg L-Lysine; 196 mg L-Methionine; 28 mg L-Phenylalanine; 15 mg L-Serine; 28 mg L-Taurine; 28 mg L-Threonine; 112 mg L-Tyrosine; 56 mg L-Valine; 56 mg Other ingredients: Hydroxypropyl methylcellulose, cellulose, silicon dioxide.These nutrients are of the highest quality and purity obtainable, free of all common allergens (antigens), and do not contain preservatives, diluents, or artificial additives.