Ergosterol (Provitamin D2 Base) from Mexico
Ergosterol, a yeast/fungi sterol, serves as the base provitamin D2 precursor requiring irradiation for vitamin activation. Imported under HTS 2936.90.0110 as a purified provitamin for synthetic vitamin D2 production in supplements. Meets Chapter 29 criteria for chemically defined organic compounds with vitamin precursor function.
Duty Rate — Mexico → United States
0%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Fungal origin requires GMO-free certification; provide fungal strain documentation for FDA review
• Specify crystalline purity (>95%) to qualify as separate compound vs. natural concentrate
• Monitor for anti-dusting agents per Chapter 29(g); additions cannot imply specific end-use