Inactive Yeasts & Other Dead Single-Cell Microorganisms

The US schedule carves out dried brewers' yeast in crude form under 2102204000, while other inactive yeasts (including nutritional yeast and refined inactive yeast) fall under 2102202000 or 2102206000. 'Crude' generally means minimally processed — not debittered, not fortified, and not further refined. Importers should obtain supplier documentation confirming processing level to support the correct line selection.

Inactive yeast destined for human food use (e.g., nutritional yeast as a food ingredient or supplement) is regulated by FDA and requires facility registration and Prior Notice filing. Feed-grade inactive yeast is subject to USDA and state feed control regulations, including labeling requirements under the Association of American Feed Control Officials (AAFCO) model bill. Importers must clearly designate intended end-use in entry documentation, as the regulatory pathway differs significantly.