can b12 injections cause skin rash Vitamin Nasty Rashes? Strange Rash/ Low B12 :

doi:10.1073/pnas.0503804102 [87] Bhowmik A, Ojha D, Goswami D, et al

chronic liver disease and hepatitis may present with elevated levels Renal impairment : Reduced clearance can contribute to accumulation, though this is rarely clinically significant Solid tumours : Certain malignancies, particularly hepatocellular carcinoma and metastatic disease, may elevate B12 levels [3] Evidence suggests that unexplained markedly elevated B12 levels without supplementation may sometimes be associated with underlying disease

Optimal timing windows include first thing in the morning before breakfast and 30 minutes before bed

Vitamin B12 injections are simple, painless injections