Vitamin B12 injections are administered by our trained medical professionals with care and precision
[DOI] [PubMed] [Google Scholar] Pappas TN, Welton M, Debas HT, Rivier J, Tach Y
Last reviewed: June 7, 2026 Last updated: June 7, 2026 Written by: Jay Hastings, CEO of PlexusDx Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations
But understanding what you are dealing with, and getting a proper assessment, makes a significant difference to how quickly and comfortably it can be resolved
They pushed patients toward unregulated gray-market sources: research use only vendors with no pharmaceutical oversight, no quality control, and no guarantee of purity or correct dosing