b12 up injection How to self-inject intramuscular vitamin - Overview Boost Your Energy with Vitamin

For severe deficiencies, daily or weekly infusions might be needed at first

This is why all B12 treatments experts advise not to retest B12 levels after treatment has begun as they are not a reliable guide to whether treatment is being effective

"Her GP gave her a course of 6 vitamin B12 injections" My understanding of UK guidance on treatment for B12 deficiency is that as neurological symptoms were present eg twitching, memory problems then the treatment should have continued beyond the 6 loading injections

They are particularly useful for individuals who have difficulty absorbing B12 from food, such as those with certain digestive issues, older adults, vegans, and vegetarians

For serological analysis, blood was collected into Multivette 600 Serum gel tubes (Starstedt), processed for serum separation as indicated by the vendor and stored at 20 C for subsequent use in virus neutralization assay and ELISA