Inactive Yeasts & Dead Single-Cell Micro-Organisms

Killed or deactivated yeast products — including nutritional yeast, inactive dried brewers' yeast, and other dead single-cell micro-organisms — are split across four 10-digit lines (2102200000, 2102202000, 2102204000, 2102206000), with a specific line (2102204000) dedicated to crude dried brewers' yeast, a by-product of the brewing industry widely used in animal feed and nutritional supplements. Brazil and France are the leading US suppliers, reflecting large-scale fermentation industries in both countries. FDA treats these products as food or feed ingredients depending on end use, and importers should confirm whether the product is destined for human consumption or animal feed, as labeling and admissibility requirements differ.