can b12 injections cause itchy skin The Impact of Vitamin Deficiency on Health Can You Have An Allergic

While oral bioavailability is lower than subcutaneous administration, these studies established that even high oral doses maintained excellent safety profiles, though higher doses (54 mg) were associated with increased gastrointestinal discomfort

Insurance may cover them for medical issues like B12 deficiency but not for weight loss or energy purposes

However, deficiencies are common, particularly in individuals with: Limited intake of B12-rich foods (vegetarians, vegans)

B12 Dosing in Patients with Renal Impairment People with kidney problems need to be careful with B12 doses

I feel like although the earlier commenters made it out like it's so 'uncommon', it's not at all