vitamin b12 sublingual vs injection Oral vs. Intramuscular in Vitamin B12 Deficiency • The Blood Project Vitamin B12 Injections vs. Supplements:

In that case, injections are not appropriate

The 2024 NICE Guideline NG239 from the United Kingdoms National Institute for Health and Care Excellence similarly distinguishes between patients who can be managed with oral therapy and those who require intramuscular treatment

A complete kit includes: A sealed vial or glass ampoule of B12 (cyanocobalamin or methylcobalamin) A 3 mL syringe A drawing needle (typically 18-21 gauge) An injecting needle: 22-25 gauge, 1 to 1.5 inch for intramuscular (IM)

The side effects are largely the same, such as nausea, vomiting, diarrhea, or stomach discomfort

The results aren't dramatic week to week