How it works: Vitamin B12 (methylcobalamin) is a foundational nutrient essential for DNA repair, red blood cell formation, fat metabolism, and nervous system health
The Research Goal: Is the study looking for a minimal effective dose or a maximum tolerated dose
However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing
A B12 deficiency injection delivers vitamin B12 directly into the muscle so that the body can absorb it efficiently
Levels should be in the normal or high-normal range if supplementation is adequate
[DOI] [PMC free article] [PubMed] [Google Scholar] 177.Nguyen MT, Satoh H, Favelyukis S, Babendure JL, Imamura T, Sbodio JI, et al