How Scary is Moldy Food?

Whether it is nature or conditioning, most humans are repelled by mold, especially on their food. We have all shared the unfortunate experience of uncovering some lost piece of fruit, jar of tomato sauce, or long forgotten leftovers at the back of the fridge only to discover our uncovering is actually covered in bluish-green fuzz. We try to handle it gingerly, having as little direct contact as humanly possible, but we always manage to get a little bit on our finger, or inadvertently touch a soft spot that feels like a sodden abyss. And mold, if left to its own devices, will certainly flourish, if not entirely colonize your fridge, pantry, or…gad…your entire kitchen. And in most cases, there is good reason to avoid and reject mold, as they signify the denaturing of the food, and they often carry toxins that could make you quite sick.

Still, for anyone that hasn’t been told, a good deal of the foods we eat are aided and cultivated by naturally occurring (and relatively benign) molds. Cheese, obviously being one of the more popular foods that is brought to maturity with the aid of surface molds and bacteria. The most notable being Penicillium notatum that brought the world penicillin. A relative of this form of Penicillin is Penicillium camemberti is added to the exterior of camembert and brie wheels to age them and create their white rinds, while Penicillium roqueforti gives blue cheeses such as stilton and roquefort their veins. There are also certain molds used to help age and flavor charcuterie and aged meats.

In essence, all food molds are parasitic by nature, and need a host to feast upon in order to thrive. Some molds, like the previously mentioned Penicillium camemberti and Muscodor albus, a fungus that emits gases, that protect grapes against another type of more nefarious mold called, Botrytis, are beneficial while others…not so much. And more often than not, consumers tend to overreact when there is a mold discovery in their kitchen. Many molds that grow upon cheese, preserves, and some fruits are utterly benign and can be cut away.

Does this mean we should, and could, just take it easy when we see mold? Yes and no, according to a BBC article on the topic. Impressively thorough advice from the US Department of Agriculture says you can rescue hard cheese and firm fruit and vegetables by cutting out at least an inch around and below the mould spot, but advises you to chuck out whiskery hot dogs, cooked meat, casseroles, grain and pasta, soft cheeses, yogurt, sour cream, jellies, soft fruit and vegetables, bread, baked goods, peanut butter, legumes, nuts and many more (be especially leery of peanut molds, as they can be horrendously toxic). Some molds cause allergic reactions and respiratory problems. And a few molds, in the right conditions, produce “mycotoxins,” poisonous substances that can make you sick.

To be on the safe side, unless it is a hard cheese, fruit or vegetable, you should likely discard the offending food, just as your intuition would tell you. And be sure to cut out/off any of the offending parts of the food before you take a big healthy bite of the food.


J.L. A.
j A5 years ago

good to know

Jane R.
Jane R6 years ago

I have cut away the moldy part of cheese and ate the rest, but if there is mold on any other foods I throw it out. I don't like to waste food but sometimes food does get lost in the fridge until it's moldy.

Nessie Benjamin
Nessie B6 years ago

Indeed, there is mold in beans, tea and anything with yeast - yeast being mold (fungus) itself!

Immigrant I AM
Immigrant I AM6 years ago

Thanks a lot!!! Helpful info

Betty C.
Betty C6 years ago


LAV M6 years ago

Throwing food away is immoral. Eat it before it has the chance to go bad!

june t.
june t6 years ago

I don't want to take a chance - if something is questionable, out it goes. Better safe than sorry - plus my vision isn't the best.

Ellie Damann
.6 years ago

thanks for sharing

Carole R.
Carole R6 years ago

Thanks for your information. My moyher always said moldy cheese was fine. We'd always just cut off the mold part and enjoy the rest. It never hurt any of us.

Duane B.
.6 years ago

Very useful information ... thank you!