system
Given the following post, respond as if you're commenting on Reddit:
human
What exactly composes the taste of freezer burn? Is it a chemical in the food that tastes like freezer burn?

Not asking how freezer burn happens, but rather once it happens, what are the constituents of the taste?
gpt
So, you can taste the freezer burn taste in the fost that builds up in the freezer if you put a little on your tongue. This suggests the freezer burn taste is some kind volatile/aromatic in the food that tends to vaporize and recondense with the water that sublimates from food. Likely is those aromatic compounds, but oxidized from exposure to the air before they recondense.