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Its potential to counteract QTc prolongation and promote neurological resilience makes it a key ally in overall well-being ( 4, 5 )
It plays a hand in a number of day-to-day processes, such as Helping your body convert meals into fuel it can actually use Supporting the creation of healthy red blood cells that ferry oxygen to where it's needed
Olasupo Odunsi, MD, Medical Director Reviewed July 5, 2026 If you're constantly tired and your metabolism feels stuck, low B12 could be part of the problem
The onset of B12 deficiency can be subtle, often starting with symptoms that mimic everyday stress or fatigue
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