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Mental health: Studies have shown that vitamin B12 plays a role in mood regulation and disorders, such as depression

Here are some of the groups who may be more at risk for a B12 deficiency (NIH, 2020): Those with atrophic gastritis: Between 10 and 30% of older adults are afflicted with atrophic gastritis, which results in decreased absorption of foods containing B12

PMID: 27138887

This typically involves using the peptides for an 8- to 12-week period, followed by a short break of 2 to 4 weeks

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Notably, proliferating neural precursors are present in other CNS regions where they give rise to oligodendrocytes and astrocytes (Barnabe-Heider et al., 2010