what length needle for b12 injections size should be used B12 Shots: Benefits, Uses, Safety, Cost & How They Work what gauge needle to use

doi: 10.1016/s0167-0115(01)00358-5

The median cord blood vitamin B 12 level was 555 pmol/L (752 ng/L) in the supplemented group and 208 pmol/L (282 ng/L) in the placebo group

All B vitamins convert food carbohydrates into energy-producing glucose in the body

It is also essential for cellular regeneration, reproduction, and it also works by stimulating IGF-1

A 2025 systematic review and meta-analysis in Frontiers in Pharmacology (Mazur and colleagues, 16 studies, 6,098 participants) found that oral, sublingual, and intramuscular B12 all raised serum cobalamin to a comparable degree, with no statistically significant difference between routes

Some people also experience mild diarrhea