The present invention relates to a process to produce a wine or fruit juice stabiliser comprising contacting a composition comprising proteinaceous material with a prolyl-specific protease, as well as to a wine or fruit juice stabiliser obtainable by said process. The invention also relates to a composition comprising peptides, said peptides having a molar fraction (%) of peptides carrying a carboxy terminal prolyl residue of at least 0.25%. Said wine or fruit juice stabiliser or composition may be used as a stabiliser against the crystallisation of KHT or other organic acids without causing protein haze.
