system
Given the following post, respond as if you're commenting on Reddit:
human
How much healthier is fresh food vs frozen food vs canned food?

Also, what is the actual difference? Are there fewer vitamins? If so, where do they go, or how do they get destroyed?
gpt
It's possible for frozen food to be healthier than fresh food. These days, it is often frozen within hours of harvesting, whereas "fresh" vegetables will spend anywhere from hours to days simply refrigerated in stores.


Canned food which has been heat treated contains less essential amino acids, and often has had salt or sugar added to it. Canned peas often come loaded with sugar for example.


(Source: food chemistry classes)