This Sourdough Starter Culture requires no cultivating. You can add this straight to your dough mix without any hassle of growing or maintaining your sourdough starter.This culture contains: Yeast, Dextrose, Lactococcus lactis subsp. Cremoris, Lactococcus lactis subsp. lactis, Lactococcus lactis subsp. lactis biovar diacetylactis.Each sachet can be used to ferment dough recipes that use up to 6 cups of flour. Contains: milk/dairy This culture is shelf-stable for 8 months.