b12 injections vs b12 pills Best Liquid Supplements 2026: Expert Picks Why do people prefer B12

Both B12 and B complex shots are given using either intramuscular or subcutaneous injections

Pregnancy and breastfeeding are also contraindications due to insufficient safety data

When to decrease dose Consider decreasing if: Persistent side effects that don't resolve Excellent results achieved and maintenance desired Budget constraints require conservation Stacking and wanting to optimize ratios Many researchers find they can reduce dose during maintenance phases after achieving initial goals during more intensive loading phases

Coverage in thinning areas may improve

at that strength a 100200 mcg dose is only 0.40.8 of a U-100 unit essentially undrawable which is one of several reasons the injectable framing is impractical as well as unproven