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As people age or deal with stress, poor sleep, or unhealthy habits, NAD+ levels drop
PMID: 22451889
B12 plays a key role in the normal functioning of the nervous system, the brain and in the formation of the building blocks of every cell in the body
They may result from: 1) an inhibition of the homocysteine remethylation pathway that is a consequence of folate or vitamin B 12 deficiencies, or the presence of the thermolabile MTHFR mutation or a functional deficiency in methionine synthase
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