Think about it: you left that onion next to the raw chicken from dinner prep. Or maybe the dog licked the counter. The onion didn’t do anything wrong—it just sat there, innocent and quiet.
The danger is that it caught germs from other things. If the onion looks slimy, smells funky, or has a weird film, toss it. Your stomach will thank you.
And if you’re like my neighbor Susan, who used a leftover onion for omelets and ended up regretting it—well, that’s a story I’ll spare you. Let’s just say she now buys frozen diced onions out of pure fear.
But what about the “onion absorbs germs” myth?
You might have heard that old wives’ tale: a cut onion left out will absorb bacteria from the air and make you sick. It’s a great story, but scientists say no. Onions don’t have superpowers.
Onions Toxicity Fact Check: Can Cut Onions Left Overnight Turn Toxic
They can’t vacuum up germs like a tiny Dyson. What they can do is get a little moldy or start fermenting overnight. That’s just plain gross, not magical.
So skip the fear, but don’t skip the fridge. If you leave an onion out, put it in a baggie and refrigerate it within a few hours.
