Why Sulfites Added to Wine?

Added sulfites preserve freshness and protect wine from oxidation, and unwanted bacteria and yeasts. ... The FDA estimates that less than 1% of the U.S. population has a sulfite allergy, and those who do are most likely asthmatic.

What are the side effects of sulfites in wine?

The bottom line

While most people can tolerate sulfites without issue, some may experience stomach pain, headaches, hives, swelling, and diarrhea. If you're sensitive to these compounds, opt for red wine or wine made without added sulfites to help limit your consumption and prevent negative side effects.

Why are sulfites bad for you?

Sulfites are a preservative many people are sensitive to that can severely aggravate asthma. Their use on fresh fruits and vegetables is banned in the United States, but sulfites are present in other foods. (Avoid products listing sulfur dioxide, potassium bisulfite, sodium bisulfite or sodium sulfite on the label.)