This is a bizarre question, but I thought I'd pose it anyway.
I've upped my calories (to my theoretical maintenance, woohoo) and it is a significant jump (30-40%).
About a week after starting this I began getting a vaguely bitter taste near the back of my mouth during and immediately after eating any food. Not acidic (like reflux), not pungent or sour, but just bitter and a tiny bit metallic.
Web searches popped up "liver issues", which led me to wonder.... am I turning myself into a foie gras goose with the sudden jump in feeding?
Andrea