how much b12 injections should i take Vitamin Injections: What You Need To Know Vitamin B12 Injection Dosage for
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[3] Hyperpigmentation is usually seen over the acral sites, especially dorsum of hands and feet, palms, soles, nails and oral cavity

[DOI] [PMC free article] [PubMed] [Google Scholar] 307.Caldwell, C

Animal studies are limited and human data are lacking, making it difficult to assess potential risks to the fetus or nursing infant

The deltoid cannot be used if that area is very thin or underused
