Wonder if this is true.
 

I read most people think the mayo in potato salad (at a picnic) makes them sick when in fact the onion will go bad before the mayo.

I think it's the temperature that makes people sick. Potato salad is suppose to be kept cold.

It is the bacterial growth at room temperature for a few hours that causes the illness. I leave my onions at room temperature 24/7 and they haven't gotten to me yet.

I doubt that an onion would cause a problem - there are eggs and oil in mayonnaise which is much more likely to go bad if it gets warm. There are preservatives in mayo.

[QdoUOTE=quiltingcandy;7671525]I doubt that an onion would cause a problem - there are eggs and oil in mayonnaise which is much more likely to go bad if it gets warm. There are preservatives in mayo.[/QUOTE]

Does this mean when I use only half an onion I don!t need to toss the other half. That's what I always do as I only buy those white onions and around here those are at least baseball sized.

Good question tru4uca, I read the same thing so I toss unused onion, It said the onion absorbs all the bad stuff in the air and its toxic

Omg! I should have constant food poisoning or worse! I rarely use a whole onion at one time...what I don't use is put in a ziplock and set in fridge....I'm in good health.....

Isn't there a phrase similar to 'That which does not kill us, makes us stronger?'

After years of throwing away unused onions, I looked on snopes.com - it isn't true, onions can go in frig to use again. It is the mayo that can go bad and cause illness. Glad I checked.

Same here..