Abstract Background This systematic review and network meta-analysis aimed to evaluate the three different administration routes of vitamin B12: oral, intramuscular (IM), and sublingual (SL) routes
B12 injections are available at: Primary care offices and specialty clinics Pharmacies (such as CVS, Walgreens, and others) Walk-in or urgent care clinics Some clinics and pharmacies offer self-injection training so that patients can administer injections at home when prescribed
The B12 Injection Experience: What to Expect At Hertford Cosmetics in Ware, we've designed our vitamin injection process to be convenient, comfortable, and effective
2016 (subcutaneous injection technique)
PMID: 22300085
This is the most dilute practical option and gives you six 5 mg doses from a single vial, though the larger liquid volume means the vial needs to be large enough to accommodate it