vitamin b12 injection for skin Injection: Energy Boost and Anemia Treatment — Mountainside Medical Vitamin B12 Injections: Boost Energy,
Description
They are just trying to absorb it orally, when the real problem is absorption

To treat them, you'll probably need shots of vitamin B12 at first, and then you may need to keep getting shots, or taking high doses of a supplement by mouth or nasally

10.1038/nature18928 [DOI] [PMC free article] [PubMed] [Google Scholar] 78.Marlein CR, Piddock RE, Mistry JJ, Zaitseva L, Hellmich C, Horton RH, et al

Individuals with digestive conditions such as Crohns disease, celiac disease, or those whove undergone certain procedures affecting the stomach or small intestine may struggle with absorption

Multivitamins with B12 as part of a number of other necessary nutrients
