Hear me out. There’s nothing innate to an object that makes it “food”. It’s an attribute we give to certain things that meet certain qualities, i.e. being digestible, nutritious, perhaps tasty or satisfying in some way, etc. We could really ingest just about anything, but we call the stuff that’s edible “food”. Does that make it a social construct?
Excellent! So what’s underneath all this, then? Can something be both real and a social construct? What things aren’t social constructs?
If the thing in question is changed, and the only part of us that can directly affect is our opinion, then I would call that a social construction.