I'm pre op getting down to my final days before scheduling my surgery trying to compose a final list of questions for my surgeon before setting a date...and I was watching a YouTube video and the lady was having serious nerve issues where her extremities were always cold to the point where damage was setting in...she also was having some vitamin deficiency where she was losing her vision...woe that scares the @% out of me.

Ask your program people the schedule for doing vitamin checks. Mine has a specific schedule for me once I'm post op. :-)