A few wineries practice to produce low sulfite or no-sulfite wines by not adding sulfur dioxide at any time during the wine-making process.Frey Vineyards of Mendocino County has been quite successful in maintaining its niche position. However, these wines are fragile and susceptible to oxidation. Sulfites are used in wineries at various stages of production, including the moment the grapes are delivered so as to hinder wild yeasts from prematurely starting the fermentation. Further, barrels are cleansed with a sulfite solution to eliminate contamination before receiving the wine. People who suffer a reaction to sulfites should remember that a dried apricot can have more sulfite than a bottle of wine.
Desert Wine and Spirits