Sulfites in Wine Get Unfair Rap

The Wine Wizard wrote the following great response to yet another person who erroneously believes he has a sulfite allergy and thus cannot drink red wine. A model of sulfur dioxide is shown to the right.

Wine Wizard replies: It is impossible to make a sulfite-free wine, because wine yeast produce sulfur dioxide (SO2) during the fermentation process. Wines with no added sulfite contain from 6 to 40 ppm of sulfite, according to most experts. Check with your physician to make sure that you really are allergic to sulfites. Only a small percentage of the population (approximately 0.01%, or 1 in 10,000) is truly allergic to sulfites. These people lack the digestive enzyme sulfite oxidase and therefore can’t metabolize sulfites. This small percentage of the population is also asthmatic, so many doctors test their patients for sulfite allergies when a diagnosis of asthma is made. These individuals typically know they’re allergic from childhood and so know to avoid all foods and beverages that contain sulfites including, but not limited to, lunchmeats, processed salami, processed fruit juices, packaged seafood and dried fruits, as well as wine.

Sulfur dioxide gets a bad rap because of the government warning label plastered on wine bottles that is only targeted to this select group of consumers. Furthermore, many people blame sulfites for the group of symptoms commonly called the “wine headache.” These symptoms are often simply caused by the alcohol in the product. There has been some speculation in the medical community that histamines — a naturally occurring substance found in foods like canned tuna and wine — are a possible culprit of this “red wine malaise,” but there has been no conclusive evidence so far. Ironically, many consumers drink white wine, thinking red wines have more sulfites, when white wines typically do.

At the end of the day, using sulfites in winemaking is usually not a health issue. Judicious use of sulfite use can significantly increase the quality of your wine. International regulatory boards usually set legal levels at around 350 ppm total sulfur dioxide and most commercial wines are bottled with totals between 50-100 ppm. A little bit of SO2, used wisely, goes a long way and won’t hurt 9,999 out of 10,000 of us.