Brazil’s General Executive Committee for Foreign Trade (GECEX) issued Resolution No. 923 of 2026 on 25 June, imposing anti-dumping duties of 26.0% to 132.6% on feed-grade lysine originating from China. Measures take immediate effect for a five-year period and cover lysine for animal feed under Mercosur tariff codes 2309.90.90, 2922.41.10 and 2922.41.90. Several product categories are excluded, including lysine clonixinate, lysine acetate, premixes or finished feeds already containing lysine, and lysine intended for cosmetic, pharmaceutical, human food, scientific research, fertiliser and human dietary supplement uses.

The investigation was opened on 27 December 2024 by Brazil’s Secretariat of Foreign Trade after a petition filed on 18 July 2024 by CJ do Brasil Indústria e Comércio de Produtos Alimentícios Ltda.; an affirmative preliminary determination on 31 December 2025 recommended continuing the probe without provisional measures. The final ruling creates a significant cost barrier for Chinese lysine exports to Brazil. Feed mill operators and buyers that have relied on competitively priced Chinese feed-grade lysine should expect higher import costs for those shipments subject to the duties and assess supply, procurement and budgeting implications for swine and poultry formulations.