Yes, every bottle of wine contains a certain amount of sulfur dioxide, and in the process of wine fermentation, yeast metabolism will produce sulfite. Therefore, even if sulfur dioxide is not artificially added, there will still be sulfite in wine. Of course, this also makes the logo of "containing sulfur dioxide" very subtle.

Nowadays, many wineries add a little extra sulfur dioxide in order to keep the quality of wine stable, so there are not only sulfur dioxide produced in the brewing process, but also artificially added sulfur dioxide.

Both sulfur dioxide and alcohol may become allergens, but many people don't know that wine contains sulfur dioxide, so the general wine label will clearly mark "containing sulfur dioxide".

According to the survey, 100 people are allergic to sulfur dioxide. If these people drink wine, it may cause headache, stuffy nose, skin flushing, dyspnea, nausea, abdominal pain, dizziness and other symptoms. Now there are many studies that the chief culprit of headache after drinking is sulfur dioxide.

Will sulfur dioxide affect wine tasting?

The answer is yes. If the winery wants to present the fresh fruit flavor of the wine to the maximum extent, it will adopt reduction winemaking, that is, sulfur dioxide is used to avoid oxidation reaction during winemaking, but excessive use of sulfur dioxide will make the wine smell like rotten eggs. However, this taste will gradually disappear after a period of sobering up.

So how do you buy a bottle of wine with low sulfur dioxide content or wine without artificial addition of sulfur dioxide? If the label of a bottle of wine says "made from organically grown grapes", it doesn't mean that it doesn't contain sulfite.

According to American law, wines marked "organic wine" cannot contain any artificially added sulfur dioxide.