Eat food if logic variable is true

I don't know if I'll help you, but I have an idea

Make two different items that would be the food you can eat and one item that you cannot, both with the same texture and name

Then put in the procedures that when the variable that lets you eat is true, if you have the inedible item, it removes it and gives you the edible, and if the variable is false, it removes the edible item and gives you the one that is not.

I don't know how to show it or something because this account is new and I have little knowledge of how it works (although I know a decent amount of modind)
If someone can transfer this idea to procedures or explain it better it would be of great help
I hope I have helped
(any spelling mistakes: google translator's fault)