busterboy I think there is something wrong with the site (as happens quite often). I've just written a post on the lung forum and wanted to add a picture of some results. I scanned them and tried to upload the scan, also photographed them and tried to upload the photo, following the correct procedure both times. I've done it before successfully but today it just wasn't happening, I kept getting 'Oops, something seems to have gone wrong' message. I know I did it the same as before, so it must be a blip with the site.
Regarding your question (apart from the thyroid meds and B12 which Greygoose has answered). When I was retesting my Vit D with City Assays, I rang and asked should I leave the supplement off. The answer was to the effect that if I wanted to see whether I was on the right dose to sustain the current level then do not leave off the supplement. If I wanted a base level to see where I would be without supplementing then I would need to be off the supplement for several weeks.
I haven't retested mine yet but I wont be leaving anything off other than thyroid meds.