Mrs D is gone but hopefully her or Rose will answer. When I was taking extra b12 my level was 1500 then I stopped and it was 2000. So I have no clue but I know for me for awhile I had bloodwork almost everyday and the ranges varied greatly. I often wonder here if that could be an issue for some. Also I wonder and this may be so wrong but don't you get b12 through animal products so if you consume more or less could that effect or am I clueless?
kdl5 welcome. In my past I also suffered from severe anorexia and depression/anxiety/ocd now healthy well still with the depression/anxiety due to this chronic pain.
I don't think it is a rule not to bring up old posts this obviously brought up an issue for someone else. I often do searches on past posts to see what people are doing etc.