The mannoproteins that compose it, obtained from a specific strain of Saccharomyces uvarum, have numerous ramifications of a small size, particularly suitable for forming stable colloids with wine tannins. The association with vegetal and grape polysaccharides has proved to be very effective on the organoleptic complexity of wine: enhancing the volume, smoothing any harshness, giving support to the aftertaste and extending the shelf-life of the bottled wine.