Pure Lysine powder supplement provides a super-concentrated source of the essential amino acid most often deficient in horses' diets. Can dramatically increase the quality and availability of the protein in your horse's diet. Especially recommended for equine diets low in alfalfa, clover and soy. Contains guaranteed min 3,033 mg (78.8%) lysine per scoop. Dosage: Foals/weanlings - 1 scoop daily; Mature horses - 1-3 scoops daily; Broodmares and training/competing horses - 2-3 scoops daily. Won't significantly increase crude protein percentage. For all classes of horses. 4 lbs = 450 scoops.