PHYLIA^® LF yeast hulls that slowly release mannoproteins and polysaccharides into the wine thanks to a specific production method, thus enabling PHYLIA^® LFto buffer the redox potential of the wine. Thus, PHYLIA^® LFprotects the wines against risks of reduction or oxidation. PHYLIA^® LF has the same protection abilities that natural wine lees without the potential risk of mercaptan production or microbiological problems.