does b12 injection have to be in muscle

https://frontierpeptidelabs.com/wp-content/uploads/2026/03/Frontier-Capsules-Mockup-5-amino-1mq-450x450.jpg American Regent quantity:5mg The muscle mass in the upper buttocks allows for a slow, steady release of B12 into the bloodstream, ensuring effective absorption is bac water the same as reconstitution solution TSP BACTERIOSTATIC 10ML | Multi-Use Sterile for Research Reviews for MIC Injections Size:400 Vials (Box) Hyvia –

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