vitamin b12 injections good or bad healthline What Are the Benefits of Injections? B12 Injections vs. Oral Supplements:

The normal levels for serum vitamin B12 concentrations in healthy persons are affected by many factors unrelated to vitamin B12 status, some of which are not considered when interpreting the results

[DOI] [PMC free article] [PubMed] [Google Scholar] 203.Donnelly KL, Smith CI, Schwarzenberg SJ, Jessurun J, Boldt MD, Parks EJ

While using recombinant EPO is prohibited both in and out of competition under WADAs Prohibited List, natural boosting of EPO through high altitude training is allowed

Combining maintenance injections with ongoing programs like bioidentical hormone replacement therapy (for patients with hormonal contributors to weight gain) creates a long-term strategy for staying at a healthy weight