b12 injection intramuscular or intravenous

https://preview.redd.it/have-yall-ever-got-a-bruise-around-injection-site-after-v0-202p5il3z71d1.jpeg?width=3024&format=pjpg&auto=webp&s=ad9accbb5a2f0aaabea77c03760f9514e100fddb protect from light 2221, National Institutes of Health Volume:100mL How SubQ Injections Like B12 and NAD+ Fit Your Routine | Olympia Pharmaceuticals

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