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Conclusion Whilst severe B12 deficiency has a clear clinical picture with characteristic haematological and/or neurological features, establishing mild or borderline deficiency can be problematic as serum levels are maintained at the expense of tissue concentrations, and therefore serum levels of B12 may be in the low normal or borderline range despite a deficiency

Statements Author contributions MT: Data curation, Investigation, Writing original draft, Formal analysis, Conceptualization, Validation

B12 shots are given in the deltoid or gluteal muscle

When neurotrophic signaling systems such as BDNF are well supported, neural circuits may maintain stronger connectivity and adaptability, supporting memory, learning, and mood stability

The topic of methyl B-12 injections, administered to help induce Speech and Language, and to address other autistic behaviors, is among the most popular web searches that parents undertake in order to help their affected offspring

The consequences extend beyond aesthetics