vitamin b12 injections vs oral supplements for Energy: Benefits and How It Works IV Therapy vs. Oral Supplements:

The starting dosage of cyanocobalamin (vitamin B12) nasal spray is 500 mcg (1 spray) in one nostril once weekly

Might be worth talking to Coeliac UK helpline prior to next round of tests

It supports tissue repair, inflammation modulation, and regenerative signaling across muscles, tendons, ligaments, and the gut lining, making it a focus for research in angiogenesis research, injury tissue remodelling, and wellness

As a general rule, IM is favored when the goal is rapid correction of a clinical deficiency, when the patient has difficulty absorbing B12 through oral or sublingual routes, or when a provider wants predictable peak serum levels