Effects of vitamin B12 deficiency can result in a range of negative health effects
This article examines the evidence behind B12 injections, clarifies who genuinely requires them, outlines potential risks, and explores evidence-based alternatives for sustainable weight management aligned with NICE guidance and NHS prescribing standards
Cobalt sensitivity reactions can result in different symptoms, such as chronic or subacute allergic contact dermatitis, which can occur immediately or up to 72 hours after administration, but the likelihood of a cobalt allergy is low and affects between 1% and 3% of the general population
Worsening macrocytic anemia : B 12 deficiency may also cause a macrocytic (megaloblastic) anemia BUT, in the presence of folate supplementation, this anemia may be masked so that B 12 deficiency may present with exclusively neurologic features
Methylcobalamin cannot be made by plants or by animals