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The facts: Sulfur Dioxide is restricted in European Union (ADI 0.7 mg/kg body weight; mandatory 'contains sulfites' labeling in wine and food), United States (banned from fresh produce 1986; mandatory labeling above 10 ppm), though the FDA still allows it in the US. We can't tell you whether it's safe for your pregnancy — that's a conversation for your OB-GYN or midwife. What we can do is show you the regulatory facts and flag Sulfur Dioxide on any product's label so you can decide with your provider. Commonly found in: Wine (most conventional varieties), Dried fruits, Some frozen shellfish.
TL;DR: Sulfur Dioxide is restricted in the EU and allowed in the US. Here's what to know if you're pregnant.
| EU status | Restricted |
|---|---|
| US status | Allowed |
| Risk level (regulatory) | — |
| Where it shows up | Wine (most conventional varieties), Dried fruits, Some frozen shellfish, Some grape juices and fruit drinks, Dried herbs (some varieties) |
Sulfur dioxide (SO2) is a colorless gas used as a food preservative and antioxidant. It is the primary active form of the sulfite family of food additives. It is generated by burning sulfur or as a byproduct of certain chemical processes. In food use, it is released from various sulfite salts (E221-E228) and directly applied to some foods.
Sulfur dioxide prevents oxidative browning, microbial growth, and color deterioration. It is widely used in winemaking, dried fruit preservation, and some fresh fruit treatment. It is one of the most effective and economical preservatives for these applications.
Same as sodium sulfite: sulfite-sensitive individuals (1% of population, 5% of asthmatics) can experience severe reactions. SO2 in wine has been identified as a contributor to wine-induced headache and asthmatic episodes. Occupational exposure to SO2 gas causes respiratory irritation, bronchospasm, and lung damage at higher concentrations — relevant to workers in winemaking and food processing but not typical dietary exposure levels.
For educational use only. This page summarizes the regulatory status of Sulfur Dioxide with citations to the primary sources below. It is not medical advice and is not pregnancy-specific medical guidance. Consult your OB-GYN or midwife for decisions about your pregnancy.
Yes. Sulfur Dioxide is restricted in European Union (ADI 0.7 mg/kg body weight; mandatory 'contains sulfites' labeling in wine and food), United States (banned from fresh produce 1986; mandatory labeling above 10 ppm). The FDA still allows it in the US.
That's a decision for you and your OB-GYN or midwife — we don't give medical advice. What we can tell you is the regulatory status above. Many people choose to limit additives during pregnancy out of caution; bring this page and its sources to your next appointment.
Commonly found in Wine (most conventional varieties), Dried fruits, Some frozen shellfish, Some grape juices and fruit drinks, Dried herbs (some varieties). Scan any product's barcode to check its label for Sulfur Dioxide.
See sodium sulfite alternatives. Ascorbic acid, reduced oxygen packaging, and refrigeration. See the pregnancy-conscious swaps below.
Scan any product's barcode and instantly see if it contains Sulfur Dioxide or other ingredients restricted overseas.
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Audited products that don't contain Sulfur Dioxide.
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