Injections may be used to quickly and effectively restore B12 levels, particularly in cases where malabsorption is a concern
Benzyl alcohol preservative (commonly described as 0.9% / 9 mg/mL where stated on label or CoA/SDS)

Owners commonly notice one or more of the following: Limping or lameness: favoring a limb, "toe-touching," or intermittent limping that comes and goes Stiffness after rest: difficulty rising after sleeping, or a slow, stiff first few minutes that loosens with movement Reluctance to jump, climb, or use stairs: hesitating at the car, couch, or staircase they used to handle easily Reduced activity or stamina: shorter walks, less play, or lagging behind on familiar routes Audible joint changes: clicking or popping from a joint, particularly the stifle (knee) Muscle loss: visible thinning of the muscle on one hind limb compared with the other, a sign of chronic underuse Behavioral changes: licking a joint, irritability when a limb is handled, or a drop in overall mood tied to discomfort A sudden non-weight-bearing lameness the dog will not put any weight on a leg warrants prompt veterinary attention rather than watchful waiting, as it can indicate an acute cruciate rupture or fracture

Certain populations need to inject B12 in larger doses to maintain baseline health: Individuals with pernicious anemia are initially injected with 100 mcg daily for one week, followed by 100 mcg every other day for 3-4 weeks
Comparative bioavailability and utilization of particular forms of B12 supplements with potential to mitigate B12-related genetic polymorphisms
(144) prepared cytosolic extracts from HepG2 cells infected with adenoviral-desnutrin/ATGL and incubated them with radiolabeled triolein and diolein substrates