Now that I self treat in a way that I no longer experience symptoms associated with B12 deficiency and the resulting known damage I am finding it helpful to think in terms of neurological signals.
Temperature regulation becomes I now get signals that I am cold or hot and do not expose my body to situations that cause my body temperature to fluctuate abnormally.
I now get signals I am going to be hungry.
I now get signals I am getting tired or tired of doing a certain activity.
Pretty much I am well versed in listening to my body and it is disconcerting to have it be telling me things in a way that is new to me. Takes a lot of emotional energy to work on it. It is not all roses as I envisioned being symptom free would be.
I still do not yet trust that I will remain symptom free. That would be foolish and in my case not reasonable as I have experienced B12 deficiency often my whole life to varying degrees of intensity and length.