Patients should never share GLP-1 pens with others, even if the needle is changed, due to the risk of bloodborne pathogen transmission
Undetected vitamin B12 deficiency due to false normal assay ...ncbi.nlm.nih.gov articles PMC3827408 by E Scarpa 2013 Cited by 25 Although measurement of vitamin B12 levels is the gold standard for the diagnosis of B12 deficiency some reports do exist concerning difficulties in its assay
Series A, Biological sciences and medical sciences, 72(1), 127133
A compounded tirzepatide formulation for patients who prefer vitamin B12 inc
For those with hematologic or renal risks, repeat testing at reasonable intervals (for example, after a few doses and then periodically) makes sense
Am J Med 1989;88:141-4 Grindulis KA, Calverley M, Cox C