intrinsic factor test after b12 injection - Intrinsic Factor Antibody Test Conflicting blood test results IFA...

Adverse Reactions/Side Effects The following adverse reactions are discussed in greater detail in other sections of the labeling: Myelosuppression [see Warnings and Precautions (5.1)] Renal failure [see Warnings and Precautions (5.2)] Bullous and exfoliative skin toxicity [see Warning and Precautions (5.3)] Interstitial pneumonitis [see Warnings and Precautions (5.4)] Radiation recall [see Warnings and Precautions (5.5)] 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reactions rates cannot be directly compared to rates in other clinical trials and may not reflect the rates observed in clinical practice

An example is: Ustekinumab (brand name: Stelara) Every medication balances how well it works with potential side effects

High Blood Levels and Vitamin B12 Transport Molecules Another method that requires a visit to the doctor for a blood test is the holo TC test, which only measures vitamin B12 that is bound to the transport molecules, transcobalamin

Theoretical concerns include methyl-donor depletion with chronic dosing