possible reasons for needing b12 injections Do You Need a Prescription Injections? Vitamin B12 injections vs tablets:
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The following screen shots are of NICE Guidelines Do not do recommendations for CFS/ME It is a really tricky page to find (and has a habit of hiding) so here is the link
Other triggers may be a dor mant viral infection, weak immunity, and damaged protective covering of the nerve fibers in the brain called myelin sheath

We are able to create nearly infinite new dishes within our lifetimes, but it takes hundreds of years to enact even the tiniest change on an evolutionary scale
doi: 10.1016/j.cell.2006.09.014

I have lost 3 lbs my first week and looking forward to the weeks to come

How do I convert B12 dosage from mcg to mL
