how to administer b12 injection in arm Shots at Home: How, Where & Often Inject Yourself where to inject b12 in

For a deeper dive into how it works, you can check out our guide on how to test for B12 deficiency at home

If you do continue a daily multivitamin, separate it from any interactions, for instance, dont take other vitamins at the exact same time as certain medications like tetracycline antibiotics (all B vitamins can bind with tetracycline in the gut and reduce its absorption)

Absorption: Injections offer near-complete absorption

While this represents a higher per-treatment cost than oral supplements, the superior absorption and reduced frequency often make injections cost-competitive over time, particularly for those who dont absorb oral forms effectively