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Fatigue is a common symptom when your body lacks enough vitamin B12 because your cells dont get the oxygen and energy they need
The Authors This article is Open Access: CC BY 4.0 licence (
Findings are further limited by small sample sizes, short durations, add-on designs, and heterogeneous populations
NNMT is an enzyme that influences methylation processes and is involved in the regulation of nicotinamide and S-adenosylmethionine (SAM) pools
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