Another limitation is that the peptide half-life chart lists plasma half-life, which is the pharmacokinetic measure most commonly reported in the literature
Use only in accordance with applicable research guidelines.
Available at: How to Use GENOTROPIN (somatropin) for Injection | Safety Info
If you're on a vegetarian or vegan diet, a B12 supplement is often necessary
In addition, if a patients clinical situation strongly suggests vitamin B12 deficiency (eg, based on characteristic neurologic abnormalities), MMA or fasting homocysteine levels should be determined, even if the lab reports a normal or even high vitamin B12 level
Gastrectomy for any reason (eg, gastric cancer, bariatric surgery) increases the risk of deficiency because parietal cells, the source of intrinsic factor, are removed (17