Scientists Discover the Bacteria in Your Cheese Might Be Good for You — No, Really

Every cheese lover has had the moment: you peel back the rind on a funky washed-rind cheese, your nose gets ambushed by something that smells like a barnyard's dirty laundry, and you think, "I am absolutely eating bacteria. I hope this ends well."

Well, science just gave us permission to stop worrying. Researchers have identified that the secret bacteria behind artisan cheeses — especially the washed-rind and hay-aged varieties — include Propionibacterium freudenreichii, a microbe that produces propionic acid. And propionic acid? It's linked to anti-inflammatory effects, reduced cholesterol synthesis, and appetite regulation.

Let me translate that from nutrition-science-speak: the stinkiest, most intimidating cheeses on the shelf — the ones that make your roommates ask "what died?" — might actually be good for you.

This is the kind of news that reorders your worldview. We've spent decades being told that cheese is a delicious but morally questionable life choice. That the saturated fat will get you. That the sodium is a problem. And sure, all of that is technically still true if you eat an entire wheel of Époisses in one sitting. But now we know that the very thing that makes those cheeses complex and challenging — their specific bacterial cultures — is doing work your gut appreciates.

The study zeroed in on how these bacteria colonize cheese during ripening. Different rind-washing techniques and aging environments produce different microbial communities, and the health-promoting ones like Propionibacterium flourish in the kinds of cheeses that smell like they're plotting something. Hay-aged cheeses, in particular, turned out to be bacterial goldmines. Who knew that aging cheese on straw would unlock the gut-health dimension?

Obviously, nobody should read this and assume a cheese plate is a medical intervention. But it is genuinely nice to have science confirm what cheese obsessives have always suspected: the funk is the feature. The smellier the cheese, the more interesting the biology. And the more interesting the biology, the more likely it's doing something your body actually likes.

So next time someone wrinkles their nose at your Limburger, hand them this study, take a bite, and smile. You're not eating mold. You're eating Propionibacterium freudenreichii. It just sounds better that way.