Colloidal silver complex as an alternative to sulphur dioxide in winemaking

► We study the use of silver nanoparticles as an alternative to SO2 in winemaking. ► Silver concentration in finished wines was well below the legal limits. ► Wines produced with silver nanoparticles had a lower alcoholic degree than SO2 ones. ► No differences in aroma and taste between silver and SO2 wines were detectable.