If yogurt is one of your favorite snacks, you’ve probably wondered about the liquid that sits on top when you peel off the cover.

It’s called the whey separation defect. It happens when the gel structure of the yogurt becomes unstable and shrinks, forcing the watery fluid to appear.

Although some companies use a stabilizer to prevent the separation and some folks opt to pour out the liquid, it’s not so bad to keep it in.

That’s because it’s a substance called whey, one of the main ingredients in milk that’s full of protein.

Want to know more about this nutritious food? Watch Business Insider's video below to learn more.

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8/26/17 - Atlanta, GA - Georgia leaders, including Gov. Nathan Deal, Sandra Deal, members of the King family, and Rep. Calvin Smyre,  were on hand for unveiling of the first statue of Martin Luther King Jr. on Monday at the statehouse grounds, more than three years after Gov. Nathan Deal first announced the project.  During the hour-long ceremony leading to the unveiling of the statue of Martin Luther King Jr. at the state Capitol on Monday, many speakers, including Gov. Nathan Deal, spoke of King's biography. The statue was unveiled on the anniversary of King's famed "I Have Dream" speech. BOB ANDRES  /BANDRES@AJC.COM

Credit: Bob Andres