Ever notice how yogurt can be thick enough to stand a spoon in, while milk just sloshes around like a sad puddle? That’s because the bacteria cause the milk proteins to coagulate, or clump together, trapping water and fat. It’s the same principle behind making cheese, but without the drama of rennet and a cheesecloth funeral.
If you’ve ever strained Greek yogurt through a cloth to make it even thicker, you’ve basically done the milk equivalent of squeezing all the juice out of a sponge. You end up with a creamy, tangy blob that makes you feel virtuous even when you eat it straight from the container at 2 a.m.
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What About the “Good” Bacteria?
Here’s where the story gets cute: the bacteria that make yogurt are actually probiotic, meaning they’re alive and happy to help your gut. Imagine tiny, invisible bouncers for your digestive system, telling bad bugs to stay out of the club. That’s the theory, anyway—sometimes my gut just wants to party with ice cream instead.
But yes, that tangy flavor you love is literally the fart smell of bacteria (lactic acid) doing its job. Don’t let that ruin your next spoonful; just think of it as friendly microbes belching on your behalf.
