vitamin b12 injection given im or sq How to self-inject intramuscular - Overview Vitamin C and B12 Injection

Subcutaneous means the medicine is injected into fatty tissue under the skin

In a systematic review, researchers found inadequate evidence to determine if intravenous vitamin C was beneficial for cancer treatment

Sublingual Tablets or Drops: You place these under your tongue, allowing the B12 to be absorbed directly into the rich network of blood vessels there, completely bypassing the digestive system

2015 Dec;21(12):283947

Prescription Vitamin B12 Injections: Tiaminal and Other Formulations Tiaminal and other Vitamin B12 injection formulas give doctors many choices for treating B12 deficiency

Small social amounts are usually fine, but heavy drinking can lower B-vitamin levels and stress the liver, especially with niacinamide