anything you read elsewhere that goes further is extrapolation, not evidence
A common research-context setup includes the 80 mg KLOW vial(s), one 10 mL bottle of bacteriostatic water per 1-2 vials, U-100 insulin syringes (one per daily injection 30- or 50-unit syringes are easier to read for small draws), and alcohol prep pads (two per injection)
This makes supplements more similar to the natural kind of B12 in foods and a combination of methylcobalamin, adenosylcobalamin and hydroxocobalamin is considered ideal
However, a low B12 level wont determine the cause of the deficiency, so further testing may be needed
Convenience For those with busy lifestyles, monthly B12 injections can be a simple, effective way to maintain optimal levels without requiring daily supplementation