L-Tryptophan from Canada
L-Tryptophan is an essential amino acid with an indole ring containing oxygen-function characteristics, classified under HTS 2922.49.4950. Used in sleep supplements, mood regulation products, and as a precursor for serotonin.
Duty Rate — Canada → United States
4.2%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Provide third-party lab tests for eosinophilia-myalgia syndrome contaminants from historical issues
• Declare tryptophan content >98% with HPLC chromatograms for CBP verification
• Use food-grade packaging to avoid pharmaceutical classification scrutiny