L-Lysine HCl 98.5% Feed Grade, L-Threonine 98.5% Feed Grade, L-Tryptophan Feed Grade manufacturer / supplier in China, offering High Quality Meihua/Julong/Fufeng Brand Feed Grade Additives L-Tryptophan, Amino Acids Feed Grade Additives Meihua/Fufeng/Golden Corn Brand 70% L-Lysine Sulphate, China Brand Cuc/Nhu Feed Grade Additives Amino Acids 99% Dl-Methionine and so on.