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The Daily Insight

What fungus is in cheese?

Author

Emily Sparks

Published Apr 10, 2026

What fungus is in cheese?

Penicillium appears in the wild as a toxic blue fungus, but in Camembert, Brie and other French regional cheeses, it is white and edible. For centuries, cheesemakers didn’t know how it evolved from its untamed to its domesticated forms.

What makes cheese moldy?

Mold grows on cheese when it is placed in a badly ventilated or moist area. Mold spores are airborne all around us, invisible to the naked eye. And if one spore makes it onto a piece of cheese, it can begin to reproduce rapidly and feed off of the cheese.

Do all cheeses have mold?

Is cheese made from mold? Cheese is not mold nor is it the by-product of mold. Some cheese varieties like blue cheese have specific species of mold that are intentionally added during the cheesemaking process to enhance the flavor of texture. The mold added to these cheeses can be thought of as a special ingredient.

What kind of mold grows on soft cheese?

Most soft cheeses are more watery, and are also the freshest cheeses, and will facilitate more growth if it comes into contact with mold. Some fungi can get all of the nutrition they need to grow by developing on cheese. Mold types of the family Penicillium, which produce blue-green spores that give the mold its color.

Is it safe to eat blue cheese with mold?

Types of Molds. Some fungi can get all of the nutrition they need to grow by developing on cheese. Mold types of the family Penicillium, which produce blue-green spores that give the mold its color. Most types of Penicillium are harmless and, in fact, are often used to give the Blue Cheeses their color and flavor, so they are very safe to eat.

Do you have to throw out moldy cheese?

Mold can grow in all types of food, and cheese is no exception. When mold appears on food, it typically means that you should throw it out. However, that may not always be the case with cheese.

What kind of mold is used to make Brie?

Keep in mind that not all molds are unwanted. Some molds are needed for the food processing stage, such as the blue mold (which is used for making the Blue Cheese) or the white and soft marsh-mellow mold (which is used in making the Brie or Camembert Cheese). If You Eat Moldy Cheese, Is It Harmful?

Is it safe to eat moldy cheese?

It usually is safe to eat moldy cheese — but there’s a caveat. It really depends on the type of cheese and your individual health. There are certain molds that are used to make cheeses, like Roquefort , bleu cheese,…

What are the side effects of eating moldy cheese?

“Some molds produce mycotoxins, which can make you really sick.”. According to the Mayo Clinic, if you were to eat a soft cheese with mold, you increase the risk of being exposed to foodborne pathogens such as listeria, salmonella, and E. coli that grow along with the mold.

Is cheese moldy?

Some people think that cheese is moldy milk, but it is not. Most cheese has no mold. Most cheese is made from My Local Cause milk through the action of bacteria, but not all. Mold and bacteria are not the same thing.