can you overdose on vitamin b12 injections Take Too Much B12? and Side Effects Vitamin B12 Overdose & Toxicity:

Special Dosing Situations for Severe B12 Deficiency In cases of severe Vitamin B12 deficiency, special dosing is key for treatment

The amino acids that are injected into the body stimulate the liver into optimizing the process of metabolism

Vitamin B12 is water-soluble but stored in the liver, allowing high serum levels to persist after large supplemental doses

Diagnosis should include serum B12 levels interpreted in clinical context, full blood count, and where appropriate, intrinsic factor antibodies and parietal cell antibodies

The most consistently documented side effect of excessive B12 is dermatological reactions, particularly acne-like eruptions and rosacea flare-ups