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SITCSection 5
U.S. imports of lysine, its esters & salts; glutamic acid & its salts (SITC 51464) totaled $19.5M in April 2026, traded with 20 countries.
Importers of Lysine, Its Esters & Salts; Glutamic Acid & Its Salts paid $1.4M in duties in April 2026 — an effective duty rate of 11% on $12.5M in dutiable value, based on actual customs collections rather than the published tariff schedule. Lysine, Its Esters & Salts; Glutamic Acid & Its Salts imports of $19.5M in April 2026 ran 60% above the year-to-date monthly average of $12.2M.
Last updated: April 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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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.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| KOREA, SOUTH | $7.3M | $6K | -$7.3M |
| NETHERLANDS | -- | $6.8M | +$6.8M |
| MEXICO | -- | $4.3M | +$4.3M |
| VIETNAM | $4.2M | -- | -$4.2M |
| INDONESIA | $2.9M | -- | -$2.9M |
Monthly import values over time