how to administer vit b12 injections Give a Injection: Step-By-Step Instructions How to Self-Inject Vitamin B12

A subcutaneous (under-the-skin) vial format exists, but the dose volume math makes injection awkward at common doses

This complex process means that conditions affecting the stomach or intestines can significantly impair B12 absorption, including pernicious anaemia, atrophic gastritis, previous gastric surgery, coeliac disease, Crohn's disease, and long-term use of certain medications (such as metformin, proton pump inhibitors, and H2 antagonists)

doi:10.4103/0976-3147.153213 Branch WT, Barton JJ

These cells are considered to function in maintaining and growing the Extracellular Matrix (ECM), which surrounds cells