Certain people are at greater risk for deficiency because of things like diet, lifestyle, and prescription medications
According to a study published in PubMed Central (National Institutes of Health), intravenous administration of vitamin B12 provides a faster increase in B12 levels compared to oral supplementation, making it a potentially better option for patients with severe deficiency
The brain, nerves, and red blood cell formation all benefit from vitamin B12
Online testimonials and self-reported experiences are not substitutes for clinical trials
A 2020 study of "wellness" B12 injections in non-deficient adults found no improvement in energy, mood, or cognitive function versus placebo at 4 weeks (Wolffenbuttel et al., Nutrients , 2020)
This selectivity provides fat metabolism benefits with a more favorable side effect profile compared to systemic hormonal interventions