The more you write the more you sound like what I heard on failsafent...really too the letter.
I think you mentioned B-12 previously giving you problems...seems like I also heard that over there too!
What I meant by gallbladder wasn't to do a flush but that your gallbladder may simply not be secreting enough bile to digest fats because you've not used lots of them.
My mom had a dickens of time when she increased her fats...she'd get nauseas and feel horrible. She went slow over a the last few years and now she's fine. Iodine also helped lots. She's 80 so her system is going to be way slower to respond than somebody younger. That may be it but I'm nto sure.