The Types axis of Mannan-oligosaccharide (MOS) market taxonomy categorises the product according to its source and production method, influencing cost structure and functional performance. Yeast‑derived MOS—primarily extracted from Saccharomyces cerevisiae cell walls—dominates due to its high mannose content and established supply chain, serving both animal and human markets. Plant‑derived MOS, obtained from guar gum, locust bean gum, or other legume‑based polysaccharides, offers a complementary profile with varying degrees of polymerisation, appealing to niche functional‑food applications. Synthetic MOS, produced via enzymatic polymerisation of mannose monomers, provides precise control over chain length and purity, supporting premium formulations in pet nutrition and specialized medical foods. The proportional adoption of each type reflects raw‑material availability, processing economics, and targeted functional claims, collectively shaping the overall MOS market’s size and growth trajectory.