I'm looking for better research on the process of mobilization of B12 from liver stores - in some textbooks it has been described as "not well understood" so it seems to me this is an open question
Your doctor will typically monitor your response and perhaps repeat blood tests for vitamin levels (or relevant markers like homocysteine levels, complete blood count, etc.) after a certain number of injections
[18] [19] A number of factors are known to affect GH secretion, such as age, sex, diet, exercise, stress, and other hormones
IMO might be worth encouraging the doctor to query the lab as to exactly what happened there
Your provider will use blood tests to track your progress and make sure your B12 levels are rising as expected
Since B12 is water based it allows for a quicker push