Refrigeration makes your food last longer by slowing down the growth of bacteria, thereby reducing the amount of wasted food.
All pickles need refrigeration, once the jar has been opened.
no,
Yes it does need regrigeration.
Once it's open, any mayo needs refrigeration.
It slows their spoilage.
Refrigeration
No
No
In my experience, a tuna fish sandwich can survive for some hours without refrigeration - you can take one to school with you in your lunchbox - but for any longer period of time, yes, it would need refrigeration.
YES!
yes, it does.
yes