The Truth About Sulfites in Wine

Sulfites are the most misunderstood topic in wine. Let's clear it up.

Sulfur dioxide (SO2) is a preservative and antioxidant used in winemaking for centuries. It prevents spoilage and oxidation. Legal limits vary: the US allows up to 350 mg/L, and the EU's limits are lower and depend on the style. Natural winemakers usually add little or none — France's Vin Méthode Nature charter caps added sulfites at 30 mg/L — though fermentation makes a small amount on its own, so no wine is truly sulfite-free.

The headache myth: sulfites don't appear to cause wine headaches for most people. Dried fruit like apricots can carry several times more sulfites than wine. If you can eat dried fruit without a headache, sulfites probably aren't your problem. Other suspects include alcohol itself, histamines, tannins, and simple dehydration.

That said, a small share of people — often estimated at around 1%, and more commonly people with asthma — are genuinely sensitive to sulfites. Lower-sulfite wines may suit them better, but they should follow their doctor's advice: no wine is sulfite-free.

What sulfites DO affect is the wine itself. High sulfite levels can mute flavors, strip aromatics, and make wine taste flat and uniform. Low-sulfite wines tend to be more expressive, more alive, more... funky.

The natural wine argument isn't really about health — it's about taste. When you remove the safety net of sulfites, you get wine that's riskier but more rewarding. Some bottles are transcendent. Some are challenging. That's the deal.