Sulfite-Free & Low-Sulfite Wine: What's Actually True
Natural & Organic Wine · Myths vs. facts
No wine is completely sulfite-free, because yeasts make a small amount of sulfites during fermentation. What you can buy is wine with no added sulfites, often labeled "zero-zero" or "sans soufre ajouté," which typically contains less than 10 parts per million. Conventional wines are legally allowed up to 350 ppm in the US, and most contain far less than that.
Sulfites get blamed for a lot, from headaches to hangovers. Some of that is fair and much of it isn't. Here's what the science says, and which low-sulfite wines we recommend.
Zero-added-sulfur wines we stock
What are sulfites and why are they in wine?
"Sulfites" usually means sulfur dioxide (SO2), a preservative winemakers have used since Roman times. It stops wine from oxidizing and turning brown, and it keeps spoilage bacteria and wild yeasts in check. Yeasts also produce a little SO2 on their own as they ferment, which is why even a wine with nothing added can show a few parts per million on a lab test.
How much sulfite does wine contain?
| Wine | Typical total SO2 (ppm = mg/L) |
|---|---|
| US legal maximum (all wine) | 350 |
| EU maximum, conventional dry red / dry white | 150 / 200 |
| EU maximum, organic dry red / dry white | 100 / 150 |
| French Vin Méthode Nature (added) | 30 or less |
| US "organic wine" (USDA seal) | No added sulfites; under 10 total |
| Zero-zero natural wine | Usually under 10 |
Sweet wines and whites generally need more SO2 than dry reds, because red wine's tannins also protect it. For comparison, dried apricots and other dried fruit can contain well over 1,000 ppm.
Why does every US wine label say "contains sulfites"?
US law requires the warning on any wine with 10 ppm or more of sulfites, which is nearly all wine, including many natural wines with small additions. It was introduced in the late 1980s to protect people with sulfite sensitivity, most of them asthmatics. European labels carry a similar allergen warning. The label tells you sulfites are present; it doesn't tell you how much.
Do sulfites cause wine headaches?
For most people, probably not. True sulfite sensitivity is estimated to affect around 1% of people, and the most common reaction is respiratory (wheezing, tightness in the chest), not a headache. If you can eat dried fruit without trouble, sulfites are unlikely to be your problem. Red wine headaches have more likely culprits: alcohol itself, dehydration, histamines, and flavonoids such as quercetin, which recent research at UC Davis linked to how the body processes alcohol. We cover those in wines less likely to give you a headache.
So why choose low-sulfite wine?
Three good reasons that have nothing to do with headaches:
- It's a sign of careful winemaking. A winemaker can only skip sulfites with healthy grapes and a clean cellar. Low SO2 usually travels with organic farming and minimal intervention.
- Texture and aroma. Many tasters find that low-sulfite wines feel more open and expressive, especially whites.
- You're sensitive. If you do react to sulfites, zero-zero wines are the lowest-sulfite drinks available.
What are the downsides of sulfite-free wine?
Without SO2, wine is more fragile. It can oxidize, go fizzy or develop faults faster, especially in heat. Store no-sulfur wines cool (around 55°F), drink them within a year or two of purchase, and finish open bottles within a couple of days. A little funk that blows off in the glass is normal; a wine that smells of vinegar or tastes mousy after you swallow is flawed. Our natural wine guide explains the difference.
How do you find low-sulfite wine?
Look for "no added sulfites," "sans soufre ajouté," "zero-zero" or the USDA organic seal (in the US, "organic wine" means no added sulfites; "made with organic grapes" allows up to 100 ppm). Ask your shop: we list added sulfur on many of our product pages when the producer shares it, and we're happy to point you to the lowest-sulfite bottles in any style.
FAQ
Is there any wine without sulfites?
No wine is completely sulfite-free, because fermentation produces a small amount naturally. Wines with no added sulfites usually contain less than 10 ppm.
Do sulfites in wine cause headaches?
Rarely. Sulfite sensitivity affects around 1% of people and usually causes breathing symptoms. Alcohol, dehydration, histamines and compounds such as quercetin are more common headache triggers.
Which wines have the lowest sulfites?
Natural wines labeled no added sulfites or zero-zero, and wines with the USDA organic seal. Dry reds generally contain less than whites and sweet wines.
Does organic wine have sulfites?
In the US, wine labeled "organic" has no added sulfites. Wine "made with organic grapes" and EU organic wine can contain added sulfites, at lower limits than conventional wine.
Low sulfite is a clue to how a wine was made, not a health claim. Look for good farmers first. Shop natural wine →
Want bottles like these picked for you every month? Join the Harvest Wine Club →
Header photo: Kristina Kutleša on Unsplash
Natural & Organic Wine
