Possible symptoms and risk factors of vitamin B12 deficiency may include: red blood cell conditions (anemia) issues with red, white, and platelet blood cells (pancytopenia) persistent fatigue skin sensations like tingling, numbness, or burning (paresthesia) erectile dysfunction bowel or urinary incontinence depression a higher chance of Alzheimers disease episodes of mania (euphoria) and psychosis Causes and risks of high vitamin B12 It is unlikely that youll develop high levels of vitamin B12 through diet alone
Unexplained weight gain deserves a workup, not a fat-burner shot
Subcutaneous Injection Injection into the fatty tissue layer beneath the skin

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

Expectations and timeline Users typically report initial effects within the first two weeks of use