A levain is made by mixing a small off-shoot of your ripe starter with water and flour and allowing it to ferment before mixing it into a dough.
A levain is made by mixing a small off-shoot of your ripe starter with water and flour and allowing it to ferment before mixing it into a dough. You can always use your starter directly to make sourdough bread, but a levain is a small off-shoot that allows you to adjust the flour, hydration, and ripening schedule (which have implications on the bacteria and wild yeast balance).