vitamin b12 injection dosage for adults over 50 MIC + – Methionine 20 mg/mL / Inositol mg/mL / Choline 50 mg/mL + Methylcobalamin (B12) – 30 mL Preservative-Free Vial – Premium Health Care Pharmacy Compounded Cyanocobalamin (Vitamin B12) Injection

Last reviewed: May 31, 2026 Last updated: May 31, 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

7 You Can Manage any Pain from the Shots Every person has a different pain tolerance

While some patients might note transient mild fatigue or a brief period of mental haziness post-injection, its typically not of significant concern

Storage: 20C, away from light and moisture

Even though the body doesnt need large amounts of B 12 vitamin, it plays several critical roles, such as: Energy production Red blood cell formation (hematopoiesis) DNA synthesis Nervous system function Brain development Fatty acid synthesis Myelin formation Cardiovascular health However, B12 absorption isnt always simple