Ajinomoto GroupAJINOMOTO GROUP Worldwide


  • Rumen Protected Lysine
  • Unparalleled purity and quality control
  • Committed sponsor of industry and academic research
  • In-house amino acid analysis of feed


  • AjiPro®-L
  • L-Lysine
  • AjiLys®
  • L-Threonine
  • L-Tryptophan
  • L-Valine
  • Ajitein®

Animal Feed-grade Amino Acid Supplements

For over 30 years, Ajinomoto has been at the forefront of amino acid animal nutrition. Starting with L-Lysine, our Eddyville, Iowa plant has expanded to produce L-Threonine, L-Tryptophan for monogastric feed, and Rumen Protected Lysine for dairy cattle feed. Our commitment to academic partnership has consistently given us the edge in R&D, and our unparalleled quality control ensures our customers receive the consistency and quality that puts us above the competition.