Almost all wine created in the United Declares will have "Contains Sulfites" on the brand. This is because about very portion of bronchial asthma patients can be extremely delicate to sulfites. Sulfites or sulfur dioxide is a substance happening normally during the fermentation procedure. Sometimes, though a wine manufacturer will add a little more because of its healthful and additive features. White bottles of wine have more sulfites than red bottles of wine because they need more protection -Imperial Wines. More information can be found at: http://www.cdrex.com/imperial-wines-of-london-limited-2369535.html