β-mannan is a type of hemicellulose predominantly found in plant-based feed ingredients such as soybean meal, palm kernel meal, and copra meal. As an anti-nutritional factor, it poses significant challenges to animal metabolism by increasing the viscosity of the intestinal contents, thereby inhibiting nutrient absorption. High β-mannan levels can lead to inefficient feed utilization and reduced animal performance, which is a growing concern for livestock producers worldwide.