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SITCSection 5
U.S. imports of methionine (SITC 51544) totaled $12.1M in April 2026, traded with 6 countries.
Importers of Methionine paid $1.5M in duties in April 2026 — an effective duty rate of 13% on $12.0M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 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.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
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.
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Monthly import values over time