where to inject vitamin b12 injections Injecting B12 What happens when
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If oral bioavailability is 20%, you would need five times the subcutaneous dose to achieve equivalent plasma exposure

As noted by many commenters, CMS has implemented improvements to surveyor training guidelines via a revised SOM, Appendix M

NA can instead be transported by SLC5A8 and SLC22A13 74,75 , while SLC7A5 and SLC36A4 are required for uptake of Trp 71,72

Understanding the underlying cause is essential, as hypercobalaminaemia often serves as a marker for significant pathology requiring investigation