vitamin b12 and folic acid injection Phoenix B Complex Injection, 100 mL at Tractor Supply Co Vitamin B12 shots: Uses, benefits,

Khodaverdian S, Dashtban-Moghadam E, Dabirmanesh B, Mirnajafi-Zadeh J, Taleb M, Khajeh K, Fathollahi Y

However, people with certain dietary restrictions, like vegetarians and vegans, cant consume most of the best vitamin B12 sources

Still, for certain studies where absolute maximal bioavailability isn't the primary endpoint, or where continuous, lower-level systemic exposure is acceptable, the oral form of 5 Amino 1mq can be a perfectly viable, even preferable, option

So when a medic says that someone with PA "can use the stored B12 in their liver", as far as I know, we simply don't know whether this is true or not