(For example, taking large amounts of folic acid has been found to mask vitamin B12 deficiency in some patients.) What Are B12 Shots
Wellness 20 July 2025 7 min read Needle Size for a B12 Injection: A Simple Guide By Alaiyka Parvez Owner, CoLaz Aesthetics Clinic The short version For an intramuscular B12 injection, the usual choice is a 22 to 25 gauge needle, 1 to 1.5 inches long, given at 90 degrees into the deltoid
Whether you prefer the quick boost from injections or the convenience of oral supplements, managing your B12 levels can greatly improve your energy and wellness
~ More information, precautions and interactions can be found under the "About B Vitamins tab." Before taking any new medication, either prescription or over-the-counter, check with your doctor or pharmacist
[DOI] [PubMed] [Google Scholar] 119.Iwabuchi T., Takeda S., Yamanishi H., Ideta R., Ehama R., Tsuruda A., Shibata H., Ito T., Komatsu N., Terai K., et al