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What Are Sulfites—And Are Their Side Effects Causing My Wine Hangover?

When you feel like crap after a night of vino and The Bachelor, its easy to point your finger at the sulfitesa.k.a. the chemical preservativesin your wine. (Never mind the fact that you took a sip every time someone insisted they were there for the right reasons and killed half a bottle; it was the sulfites, dammit!)
Stop Blaming Your Wine Hangovers On Sulfites, Guys
Stop Blaming Your Wine Hangovers On Sulfites, Guys

That said, the next time you're tempted to blame your wine hangover on sulfites, think twice before swearing off vino altogether and get your blame game straight.

Heres everything you need to know about sulfitesincluding just how much they contribute to that post-Bachelor head throb. (Hint: Probably not as much as you think.)

What exactly are sulfites, anyway?

In case you didn't know (I didn't...), sulfites are chemicals used as preservatives and sanitizing agents in food processing, explains Sonya Angelone, RD, dietitian and spokeswoman for the Academy of Nutrition and Dietetics.

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Sulfites prevent bacterial growth and the browning of foods exposed to oxygen, she says. They also prevents the growth of undesirable microorganisms during fermentation and food processing.

Nope, sulfites dont just show up in wine. In fact, you'll find 'em in a slew of different food products, says Beth Warren, RD, dietitian and author of Secrets of a Kosher Girl .

Theyre not always just additives, either. Sulfites are found naturally in a variety of foods, Warren says.

What foods and drinks contain sulfites?

Sulfites naturally occur in black tea, eggs, vinegar, fermented foods, peanuts, wine, broccoli, cabbage, kale, garlic, onions, strawberries, plums, and coconuts, says dietitian Scott Keatley , RD..

In addition to these natural sources, you'll also find sulfites as additives in tons of other eats. Heres a solid list of foods that may be high in sulfites, from Warren and Angelone:

  • Baked goods
  • Soup mixes
  • Jams
  • Canned vegetables
  • Pickled foods
  • Gravies
  • Dried fruit
  • Frozen fruit and vegetables
  • Potato chips
  • Trail mix
  • Beer and wine
  • Some fruit and vegetable juices
  • Syrups
  • Tea
  • Molasses
  • Fresh or frozen shrimp
  • Guacamole
  • Maraschino cherries
  • Peeled potatoes

So, basically sulfites are everywhere.

What do sulfites look like on ingredient lists?

If you now feel like literally everything you eat contains sulfites, I had the same reaction. Luckily, you can totally identify which of your go-to foods and drinks contain sulfites.

By law, additives like sulfites have to be listed on a product's ingredients list, says Keatley.

Look out, though; sulfites can show up under a few different names. Keri Gans, RD, dietitian and author of The Small Change Diet , recommends keeping an eye out for the following:

  • sodium sulfite
  • sodium metabisulfite
  • sodium bisulfate
  • potassium bisulfate
  • potassium metabisulfite

Are sulfites actually bad for you?

Though sulfites get blamed for practically everything, they arent necessarily bad. Like, do you get a hangover after you have tea? Or eat trail mix? Probably not. Billions of people consume sulfites with no reaction whatsoever, Keatley says.

That said, sulfites can cause trouble for people with sensitivities and allergies to the chemicals, which aren't all that uncommon. Sulfites are one of the top 10 allergens in the United States, Keatley says.

In people who are sensitive or allergic to these chemicals, the effects of consuming them can include nausea, diarrhea, gas, and headaches. The reaction is more severe in people with asthma, who may experience wheezing, congestion, shortness of breath, and even anaphylaxis (a potentially life-threatening allergic reaction), says Angelone.

If you notice these symptoms after eating or drinking a sulfite-containing product, you might have an issue with them. (To know for sure, get tested by an allergist.)

The verdict on that whole sulfite wine hangover stuff.

Ultimately, for most vino lovers, dehydration and the histamines (compounds that can trigger inflammation) in wine are the real hangover culprits, says Keatley. However, if you do have a sulfite allergy or sensitivity, youll probably feel pretty crappy after drinking wine (even after just a few sips).

FYI: White wines contain more sulfites than reds, so if you have a sensitivity or allergy, you're more likely to notice if after drinking Chardonnay than Cab Sauv, says Gans.

Otherwise, you can avoid the throbbing headache by sticking to just one glass of wine and drinking plenty of water before bed.

The bottom line: Sulfites don't cause hangovers, but if you have a sulfite allergy, you might feel like crap after consuming one of the (many) foods that contain these chemicals.

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