Dannie Boy wrote:
The principle behind all of this is that all food has bacteria in it and when you defrost frozen food, the bacteria multiplies (especially if defrosted in 30+ degrees) and re freezing it doesn't kill the much multiplied bacteria, so the chance of food poisoning when reusing the once again thawed food is multiplied significantly, whereas if you had cooked it before freezing the bacteria would have been greatly reduced. I don't know the science behind it all, but defrosting raw food and then re freezing it, defrosting it again and then cooking, does not allow the cooking process to kill off all the bacteria, hence the food poisoning risk.
That's pretty much it. So while defrosting in a fridge gives less risk, as bacteria grows at a much slower rate, the risk is still there. Obviously it also depends on how long between freezings. If you defrost something in the fridge then refreeze after two day it may well be (I don't know the numbers, so I may be wrong) more dangerous than defrosting something quickly in the sun the refreezing an hour later.
christopher1 wrote:What I have seen on several occassions over the years, especially in the big stores.When re-stocking the chicken portions they appear to have been frozen and are thawing out. Surely one would think that they would notify the customer that this was originally frozen produce and shouldn't be re-frozen.
Anyone else noticed this?
I haven't seen it here - but then I don't cook at home here. Are you sure they're thawing out, or does it just look like the edges might be a bit 'ice crispy'? It could be that at some point in the transportation to the shelf, they're being kept in ice to keep them cold, and this is causing the meat to ever so slightly freeze? Just a wild guess.
Certainly in England, if a product has been frozen and thawed at any part of the production process (usually ready meals etc) then they have a message somewhere that says "not suitable for home freezing"