U.S. imports of Lysine, Its Esters & Salts; Glutamic Acid & Its Salts (SITC 51464) totaled $11.3M in August 2026, imported from 22 countries.
Importers of Lysine, Its Esters & Salts; Glutamic Acid & Its Salts paid $1.5M in duties in August 2026, an average duty rate of 13.36% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataLysine and glutamic acid are two of the most commercially significant amino acids in global agricultural and food trade: lysine is a critical limiting amino acid in swine and poultry feed formulations, while glutamic acid and its monosodium salt (MSG) are widely used flavor enhancers in processed foods. Both are produced predominantly through microbial fermentation, and the US import market for feed-grade lysine has historically been shaped by antidumping proceedings against major producing countries. Because these compounds are used in both food and animal feed applications, importers must determine whether a shipment is subject to FDA food additive review or USDA feed ingredient oversight depending on the declared end use.
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224 import shipments a month
Yes, antidumping duty orders on lysine from certain countries have been active in the past. Importers should query the USITC and Commerce Department's antidumping order database before entry, as scope and suspension status can change. Working with a licensed customs broker to conduct an order-scope analysis is strongly recommended, particularly for feed-grade lysine in bulk form.
Yes. Lysine and glutamic acid destined for human food use are subject to FDA oversight as food additives or GRAS substances, requiring compliance with applicable food-grade purity standards. Feed-grade material falls under USDA and state feed regulatory frameworks. Importers should clearly declare the intended end use on entry documentation, as misclassification between food and feed grade can trigger compliance issues with both agencies. Consult a licensed customs broker or the relevant agency to confirm admissibility requirements for your specific shipment.
Basic heading 244 of 465 in section 5
Basic heading 51464 · $11.3M of $27.5B
Imports · August 2026
origin
China and South Korea together supply 48% of it. Brazil pays 42.4% duty; China 7.7%.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
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12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $127.9M of Lysine, Its Esters & Salts; Glutamic Acid & Its Salts and exported $100.9M.
Through August 2026. Source: U.S. Census Bureau.