Dietary Supplement. Enriched Free Form Amino Acid. TwinLab L-Tyrosine Plus Capsules provide a unique combination of the amino acid L-Tyrosine enriched with Vitamin C and Vitamin B6 are added to maximize and enhance the natural metabolism and utilization of L-Tyrosine. TwinLab L-Tyrosine Plus Capsules are easier to swallow and assimilate. Well tolerated by most highly allergic individuals. No tablet binders, coatings or colorings. Free of the most common allergens such as corn, soy, yeast, rice, barley, wheat, lactose (milk sugar) and all milk, citrus, fish, and egg products. No added flavorings, sugars, salt, artificial sweeteners, colorings, preservatives or salicylates.