L-Tyrosine from Mexico
L-Tyrosine is a non-essential amino acid with a phenolic hydroxyl group, classified as an oxygen-function amino-acid under HTS 2922.49.4950. It serves as a precursor for neurotransmitters like dopamine and is used in nutritional supplements and pharmaceuticals.
Duty Rate — Mexico → United States
14.2%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Verify purity certificates (typically 98%+ for USP grade) to meet FDA food/supplement import standards
• Include Certificate of Analysis (CoA) showing optical purity (L-form vs DL) to avoid reclassification
• Label as 'food grade' or 'pharma grade' accurately to prevent CBP scrutiny on end-use claims