does b12 injection have to be in muscle

https://images.squarespace-cdn.com/content/v1/5bb7a582fd67933734c064e5/4eeb060e-4be1-4292-8c16-16ecda164e3a/Methylcobalamin+VITAMIN+VIAL.png Vitamin B-12 Critical Functions of Vitamin B12: Your body depends on B12 for DNA synthesis, the process by which cells replicate and repair themselves quantity:5mg Capsulated 5-Amino-1MQ · Disguised Alpha

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