Your bone marrow is a factory producing millions of red blood cells a minute — and rapid cell division is exactly what B12 exists for: copying DNA, the step every new cell needs. When B12 runs low, the factory keeps producing but the cells come off the line big and immature, unable to carry oxygen properly. The fatigue and breathlessness that follow are mechanical: fewer working couriers. This guided journey covers the factory, the signature, and the partnership whose masking trap makes this deficiency sneaky.
3 quick steps~2 minutesEvidence-awareHealth info, not a diagnosis