The phrase "contains sulfites" is printed on many if not most bottles of wine, typically somewhere on the back label. The words admittedly read like a warning label, which is inherently off-putting.

2 glasses of wine being held up and clinked - Yuliia Kokosha/Getty Images Just when you thought you had everything you really needed to know about wine figured out, like which bottle of Barolo to pair ...

Few topics in the wine industry fuel as much controversy as sulfites. These compounds are blamed for everything from flushed cheeks to morning-after headaches and plenty of alleged issues in between.

Just when you thought you had everything you really needed to know about wine figured out, like which bottle of Barolo to pair with a bolognese, which Chablis to choose with roast chicken, and which ...