Cautious use of parenteral cyanocobalamin is also recommended in patients with renal impairment, including premature neonates, because of the possibility of greater aluminum accumulation, which may cause central nervous system and bone toxicity
At room temperature with moderate humidity, an unprotected peptide will lose potency over months
Immediate Absorption: Intramuscular or subcutaneous administration delivers quick correction of B12 deficiency and maximum bioavailability
A mouse metabolises on a faster clock than a human, and a controlled diet in a cage is not a free-living human diet so even the week-numbers above should be read as the shape of a gradual response, not a promise that a human would see anything on the same calendar
Many vials contain measured amounts like five milligrams per vial
Understanding the difference isn't just an academic exercise