Sulfite

These chemicals are used as preservatives in wines, dried fruits, and dried potato products, such as mashed potato flakes. About five percent of asthmatics have difficulty breathing within minutes of eating a food containing sulfites. The reaction can be fatal and requires immediate treatment at an emergency room. Sulfites occur naturally in almost all wines. Those bottled after mid-1987 must have a label stating that they contain sulfites if they have more than 10 parts per million of the additive. Organic wines are not necessarily sulfite-free, however most beers no longer contain sulfites. Although shrimp is sometimes treated with sulfites on fishing vessels, the chemical may not appear on the label. Avoid shrimp if you are allergic to sulfite. In 1985, the federal government banned addition of sulfites to most fresh fruits and vegetables. Fresh-cut potatoes and dried fruits are exceptions.