Are frozen food safe to eat ?

In food industry there are two process mechanical and cryogenic

In mechanical freezing air is passed over food items causing them to slowly cool down and freeze 

while in cryogenic or flash freezing ,food items are either directly sprayed or immersed in refrigerates like liquid nitrogen or carbon dioxide thus freezing the food instantly.

Frozen foods do have certain advantages 

Firstly nutritional loss is almost negligible 

Secondly while transporting and storing fresh food items ,harmful bacteria can grow and contaminate the food , however this will not happen in case of frozen foods because bacteria don’t usually grow in low and freezing temperature ,however some frozen foods may contain stabilizer and trans-fat, which is harmful 

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