Rather than injecting large doses infrequently (most of which you will flush out within an hour), its much better to inject smaller, daily doses
(PubMed) Zeng T, Zhang CL, Song FY, et al
For example, if its 1,000 mcg/mL and you get 1 mL, you get 1,000 mcg of B12
Biohacker Protocol (experimental) Dose: 500 mcg (1 capsule) Duration: 8 12 weeks Frequency: 1 capsule once daily, continuous low-dose Cycle Interval: Periodic 2-week pauses Goal / Description: Long-term microdose protocol explored for sustained cytoprotective observations
The absence of one B vitamin can affect the activity of others, highlighting their interdependence
(2004) Troglitazone inhibits the progression of chronic pancreatitis and the profibrogenic activity of pancreatic stellate cells via a PPAR-independent mechanism Pancreas, 29, 67-74 20