Lalvin QA23, selected on soil types from the area of the appelation of Vinhos Verdes in Portuga offers qualities of fermentive security bound to a weak demand in assimilable nitrogen and O2.Lalvin QA23 is an excellent choice for wine styles like Chardonnay, Sauvignon Blanc, Sémillon, Chardonel and Gewürstraminer. Terrific for mead and cider fermentations, too.