Bottles for sale at Passage de la Fleur, a natural wine shop in Brooklyn, N.Y. For some, natural wines must be completely unadulterated — without the use of sugar, clarifiers or other additives common in modern winemaking. Other natural winemakers, however, will use a little sulfur or added yeast to correct problems, according to Stephen Meuse, a wine buyer in Massachusetts.
Andrea Shea for NPR
If you follow the vast world of fermented grapes, you ma…