Lalvin QA23, selected on soil types from the area of the appellation of Vinhos Verdes in Portuga offers qualities of fermentative security bound to a weak demand in assimilable nitrogen and O2.
Lalvin QA23 is an excellent choice for wine styles like Chardonnay, Sauvignon Blanc, Semillon, Chardonel and Gewurztraminer.
It has low nutrient and oxygen requirements and it has been known to ferment juice at low temperatures (15C/59F) to dryness. QA23 is an excellent thiol converter making it a complementary yeast for developing varietal Sauvignon Blanc passion fruit character. It also produces large amounts of the enzyme beta-glucosidase during growth which allows for the release of bound terpenes in aromatic varieties.