I should have clarified, I didn’t stop taking everything I normally took, just ones that potentially impact the liver. I take many of those same supplements because I don’t absorb B vitamins and folate.

The HIDA scan can be ordered by your GI or PCP. The scan itself is probably around an hour total. They scan you multiple times over that time period, and then i heft some type of contrast and observe how long it takes your gall bladder to process jr and to what extent it is absorbed. That helps them determine functioning.
Have you had any gall bladder symptoms? I had a lot (nausea, pain in between shoulder blades, general feeling of being unwell, and eventually, couldn’t eat meats or any foods with fat without feeling sick.