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Vitamin B12 plays a vital role in various bodily functions, including the production of red blood cells and the maintenance of the nervous system

There is no confirmed FDA approval timeline as of 2026

When this system is functioning well, you might barely notice the occasional cold

The disadvantage is equally clear

Vitamin B12 is water-soluble, and excess amounts are generally excreted through urine

[3] The British Society for Haematology guidelines emphasise that the response to treatment should be monitored through clinical assessment and blood count testing, rather than routine measurement of B12 levels after treatment has started