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Description
but see Engert and Bonhoeffer 1997)

It supports the development and function of nerve cells, helps in the production of myelin (a protective coating for nerves), and contributes to nerve signal transmission
In addition to helping your cells produce energy, vitamin B12 plays a key role in brain health, DNA synthesis, red blood cell formation and the production of serotonin and dopamine two neurotransmitters that support focus and mood
Adequate hydration (at least 2-3 liters daily), fiber supplementation, and magnesium citrate at bedtime are the first-line approaches