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Mar 22, 2012 07:25 AM

Leftover Onions Poisonous?

I received an email from a relative (a forward of a forward) stating that onions attract and grow bacteria very quickly and that because of this, slicing an onion then consuming the leftovers a few days later (even if its been covered and refrigerated) can be harmful and make you ill due to how quickly they become contaminated.

I often only use half an onion and store the rest wrapped in plastic wrap in the fridge until I use it a few days later.

Is this claim accurate, should we not use onions long after they have been cut?

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      1. re: travelmad478

        That's a new one to me. Then again, my food safety practices should have killed me a dozen or more times by now.

        Not everyone seems to agree:

      2. In my experience over the past few decades, when I receive a forwarded email, it's likely not worth the time to read. I would guess no, it's not accurate.

        1. How long is "not long after they're cut"? Hours? Days? Weeks? I can attest to using onions a few days after cutting has no ill effects, although the surfaces can dry out and look a bit grotty.

          1. Were it true, I'd have died in my thirties. 71 now and still saving and using half-onions …