In these cases, serum B12 levels will shoot up (the blood test counts inactive B12 too), but there may still be a deficiency of adenosyl B12 and methyl B12 in the cells, tissues and body fluids
Age-Related Deficiency Factors Getting older increases the risk of vitamin B12 deficiency
The enzyme methionine synthase needs methylcobalamin as a cofactor
B12 is a necessary component of the Krebs Cycle, the series of chemical reactions that generate ATP
GLP-1 peptides (semaglutide, tirzepatide, retatrutide) Semaglutide , tirzepatide , and retatrutide are highly potent GLP-1 compounds
They will review your medical history (or may be able to assess you for anemia and treat as clinically indicated ) , help you understand the risks and symptoms of vitamin B12 deficiency, and share advice for prevention