Ubelinda -
My B12 deficiency was caused by my Celiac Disease damaging my ability to absorb B12 - 30 years ago. With the other cumulative consequences showing up over these years as multiple Autoimmune dysfunctions - thanks to my Irish ancestry.

There is a quick way to we used to identify my B12 deficiency - checked my CRP (C reactive protein) which is a general measure of inflammation. And when the result was high we instituted 1cc B12 injections once a month. Rechecked the CRP and when it went down began a treatment process that has continued today -albeit recently at a 0.5cc self injections every 5th day. There maybe other means of testing B12 today.

And the positive benefits from following this newer plan over the last 3 months has been remarkable. My sense of smell and taste has comeback after 15+ years and what I had thought was moderate Asthma turns out to be related the autoimmune dysfunction called ‘histamine intolerance’.

B12 will not solve my Celiac disease, but it sill clearly improve my ability to manage my other autoimmune dysfunctions.

Chris47 -

PS - If you have ever had any prolonged gut issues and/or are of Irish ancestry testing for the CD gene using the new HLA blood test series can indicate if your fatigue is CD related and if so indicated, B12 injects versus oral ingestion is the best path forward!