b12 injections not being absorbed Are Vitamin Shots Right for You? Pernicious Anemia: Definition, Symptoms, Causes

First, the association comes from groups of patients, largely hospital populations already unwell enough to have blood taken

PubMed laboratory research record [PMID: 23315429] PubMed record related to this compound for laboratory literature review

In some cases, the sequential use of different B12 status biomarkers or the calculation of a composite B12 status score (derived from a panel of B12 biomarkers and adjusted for folate status and age) can be used to detect deficient states that may otherwise be overlooked when using a single biomarker approach such as a B12 level (92)

Note that tirzepatide compounded with B12 will have a pink or red color from the B12, which is normal for that specific formulation