U.S. imports of Methionine (SITC 51544) totaled $9.7M in August 2026, imported from 8 countries.
Importers of Methionine paid $1.1M in duties in August 2026, an average duty rate of 11.28% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataAn essential sulfur-containing amino acid, methionine is a high-volume commodity traded primarily as a feed additive for poultry and swine, where it supports protein synthesis and growth performance. The feed-grade market is dominated by synthetic DL-methionine produced via large-scale chemical synthesis, and global supply is concentrated among a small number of major chemical producers. Importers should be aware that feed-grade methionine entering the US may be subject to FDA oversight as an animal feed ingredient, and product specifications — particularly purity and form (liquid vs. solid) — affect both classification and pricing.
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59 import shipments a month
Feed-grade methionine is regulated by FDA as an animal feed ingredient under the Federal Food, Drug, and Cosmetic Act. Importers must ensure the product meets FDA purity and labeling standards; shipments may be subject to FDA examination at the port of entry. Consulting a licensed customs broker familiar with feed ingredient imports is advisable.
Yes. Liquid methionine (typically methionine hydroxy analogue) and solid DL-methionine may be classified differently under the harmonized system, and their pricing, handling, and storage requirements also differ. Buyers should confirm the exact form and concentration with their supplier before finalizing import documentation.
Basic heading 259 of 465 in section 5
Basic heading 51544 · $9.7M of $27.5B
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Imports · August 2026
origin
Belgium and Singapore together supply 89% of it. China pays 32.7% duty; Japan 0.0%.
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.
Imports
Imports
$9.7MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $96.9M of Methionine.
Through August 2026. Source: U.S. Census Bureau.