Is Your Cinnamon Fake? Where Does Kefir Come From? Plus: Why Is Citric Acid In Everything? Ask Gastropod!

The season for holiday baking is upon us, and before you spice up your cookies and pies, you’ll probably want to know: is most of the cinnamon on grocery store shelves actually fake? That’s one question we’re investigating this week on behalf of you, dear listeners, in the latest installment of our popular Ask Gastropod series! This episode, we've got the scoop on what's real when it comes to cinnamon—because your buns deserve the truth. We're also putting our detective hats on to figure out where in the world kefir comes from, in an epic tale that involves mummies, a prince, and a potential kidnapping. Finally, if you look at almost any label, from jam to ice cream to soda to sausage, you'll find one shared ingredient: citric acid. What on Earth is this additive doing in everything, how is its spread connected to a technology that has saved millions of lives—and is it safe to eat? Listen in for a festive feast of listener curiosity, and keep your awesome questions coming our way! Learn more about your ad choices. Visit podcastchoices.com/adchoices

You can listen to Is Your Cinnamon Fake? Where Does Kefir Come From? Plus: Why Is Citric Acid In Everything? Ask Gastropod! online on Radio and Podcast. Open the player on this page to stream the available audio.

Is Your Cinnamon Fake? Where Does Kefir Come From? Plus: Why Is Citric Acid In Everything? Ask Gastropod! is an episode from Gastropod by Cynthia Graber and Nicola Twilley.

This episode is 42:33 long.

This episode was published on Dec 16, 2025.

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