Biosprint is a microbiological feed additive produced and worldwide distributed by the Italian biotech company Prosol S.p.A.¹ This zoo-technical additive contains cells of the yeast Saccharomyces cerevisiae, selected under the unique code MUCL™ 39885 and deposited in the Belgian collections of micro-organisms under the Mycothèque de l’Université Catholique de Louvain.² Biosprint has gained the EU authorization as feed additive for beef cattle, piglets, sows, dairy cows, and horses.³ According to several tests, the influence of Biosprint on the diet consists of the improvement of the digestive efficiency and of the better assimilation of nutrients.⁴⁵