how often can vitamin b12 injections be given Injection Dosage How Often Can You Get
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[DOI] [PMC free article] [PubMed] [Google Scholar] Middleton 1985 Middleton J, Wells W

it can cause some health concerns

Can I have loading doses

Specifically, the muscle injected is known as the vastus lateralis

PCT is believed to prevent testicular atrophy and inhibits feminization processes, such as gynecomastia

Anything higher than that quickly becomes too much volume for one subQ site, which is why oral capsules are the standard route
