ACTIVE INGREDIENTS PER ½ TEASPOON (2.7 GRAMS): L-Lysine Hydrochloride....500 mg INACTIVE INGREDIENTS: Citric Acid, Edetate Disodium, Maple Flavor, Potassium Sorbate, Purified Water, Riboflavin 5'-Sodium Phosphate, Sodium Benzoate, Sodium Carboxymethyl- cellulose, Sucralose.