Why Do People Scrunch Up Their Faces After Tasting Something Sour?

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Why Do People Scrunch Up Their Faces After Tasting Something Sour?
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If your jaw tenses up and your eyes begin to water just thinking about NationalSourCandyDay, this is a must-read. 🍋😜

Could you do it? No, probably not. How is it that a fist-size fruit has the power to make you move your muscles against your will?

The taste we know as"sour" has a direct relationship with acidity. In chemical terms, sourness is your taste buds saying"there are a lot of loose protons in your mouth right now!" Of course, protons aren't actually sour. Our bodies have evolved to interpret their properties as being sour, research shows.

Here's the embarrassing thing: Most creatures can make their own vitamin C, but we can't. About 61 million years ago, the genes in mammals that coded for vitamin C synthesis mutated, according to a 2011 study in the journal Genetica . Back then, we had such easy access to dietary vitamin C that the mutation wasn't selected against.

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