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28 People often continue to experience mild neurological symptoms such as poor memory, impaired concentration, and fatigue even after adequate B 12 replacement (eg, therapy according to the BNF suggested treatment regimen) 9 17 29 and many patients report they need additional treatment

H., Saini, D

The benefits of B12 injections may include: Improved Energy Levels : B12 plays a crucial role in converting food into energy, and B12 injections can help combat fatigue and boost energy levels

[DOI] [PubMed] [Google Scholar] 18.Vitamin B12 status and rate of brain volume loss in community-dwelling elderly

In this regard, the intranasal route is a promising delivery method to obtain greater efficacy in maintaining optimal drug concentrations in the brain compared to parenteral injections (Mittal et al., 2013