injection cyanocobalamin b12 (B12) 1000 mcg/mL, Multiple Dose Vial 1 mL, 25/Tray Most people get enough vitamin B Cyanocobalamin Injection, USP 30000 Mcg/30

Pediatric Use

Some medications may be incompatible with bacteriostatic water or with the benzyl alcohol preservative

These water-soluble vitamins enter the body easily and are best known for their metabolism-enhancing effects [2]

Oral Supplements: A Quick Comparison For people with a confirmed deficiency, especially those with absorption problems, injections generally act faster than oral supplements: Injections: bypass the gut, reliably reach the bloodstream, and often produce noticeable changes in energy and mental clarity within days for those who are deficient

Those observations are included here only to summarize research context