Hamecomos protects animals against mould and their toxins. Yeast is a source of nutrients important for the growth and the health of animals and for their production. Yeast is also an important modulator of the digestive flora. Production pressures along with customer demands for improved animal well-being and removal of antibiotic growth promoters have placed immunity and our capacity to modulate the animal’s immune system and the intestinal microbiota structure in the forefront of animal production concerns.