They’re almost certainly in your feed, so understanding more about these compounds is the first step to stopping them sapping your productivity, and reducing their wider environmental impact…
β-mannans = non-starch polysaccharide (NSP) fibres
Naturally occurring non-nutritive feed compounds
β-mannans cause a natural, but costly series of events within an animal, called a Feed-Induced Immune Response (FIIR):
1. The animals’ innate immune system misrecognises β-mannans as a potentially disease-causing pathogen and mounts a response to protect itself against the perceived threat.
2. This natural, but unnecessary immune response
3. Animals need to be fed more to compensate for these losses.
β-mannans cause a feed induced immune response (FIIR)
Reduces nutrient digestion
Diverts energy away from growth / production
Negatively impacts on gut health
Increases feed costs
1. Daskiran, M., Teeter, R., Fodge, D. and Hsiao, H. 2004. “An Evaluation of Endo-ß-D-mannanase (Hemicell) Effects on Broiler Performance and Energy Use in Diets Varying in ß-mannan Content.” Poultry Sci. 83: 662-668.