7 Things You Never Knew Were In Your Wine

Low-alcohol wines are lighter in calories

Sulfites, tannins, resveratrol—if you’ve read anything about wine, you’ve probably come across at least one of these terms. But what does all the fancy verbiage mean for your health? We asked Jim Harbertson, PhD, associate professor of enology (that is, the science of wine) at Washington State University, to decode the lingo commonly found on bottle labels so you know exactly what you’re drinking, and how it affects you, beyond a nice buzz.

Sulfites

What it means: “Sulfites are normally added to wine to protect it from oxidation or unwanted microbial growth,” Harbertson says. In other words, they keep wine fresh and prevent it from morphing into vinegar. Sulfites have developed a bad rap for causing allergic reactions like sneezing and headaches, but in reality, only a small portion of the population exhibits a sensitivity or allergy to them. There’s also some indication that they trigger symptoms for asthmatics, but the relationship between worsened asthma symptoms and sulfites isn’t totally clear, Harbertson says. You’ll spot “contains sulfites” on wine bottles because the U.S. Food and Drug Administration (FDA) requires that labeling when any food contains more than 10 parts per million of sulfites, but for most people, they’re nothing to worry about. Know for sure you’re allergic? Look for the words “sulfite-free” on labels.


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