Segmentation by type classifies brewer's yeast into active dry yeast (ADY), inactive dry yeast (IDY), yeast extract, and β‑glucan‑enriched yeast, each contributing distinct functional attributes to animal feed formulations. ADY, comprising live cells, is primarily employed for probiotic benefits, enhancing microbial balance in the gastrointestinal tract; it represents a modest portion of the market due to handling constraints. IDY, the most prevalent form, offers high protein content and digestibility without viability concerns, thus driving the bulk of volume sales. Yeast extract, rich in nucleotides and B‑vitamins, is positioned for performance‑oriented feeds aiming to improve immune response and stress resilience, commanding a premium price point. β‑Glucan‑enriched yeast, extracted for its soluble fiber, is increasingly adopted in specialty feeds targeting disease resistance and gut health, reflecting a growing trend toward functional additives. The distribution of these types mirrors the balance between cost efficiency and functional performance sought by feed manufacturers.