vitamin b12 injection name B-12 3000 mcg Injection, 100 mL Compounded Cyanocobalamin (Vitamin B12) Injection

What steps you can take to investigate the root cause

This autoimmune condition attacks the intrinsic factor, a protein your stomach makes that's required for B12 absorption

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View image online ( Person with furrowed brow, standing by window with their hand on their chest, taking a breath Most heart palpitations are short-lived, dont come with other symptoms and can be managed at home

K., Salimiaghdam, N., Ozgul, M., & Kenney, M

For most people taking B12 at standard supplemental doses as part of a well-formulated multivitamin, this isn't a concern