Paul Saladino· MD
the MCV is a metric that we use to tell about how healthy those red blood cells are too small means usually iron deficiency which may actually be hidden copper deficiency in a lot of people and too big is B12 or folate deficiency
The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
the MCV is a metric that we use to tell about how healthy those red blood cells are too small means usually iron deficiency which may actually be hidden copper deficiency in a lot of people and too big is B12 or folate deficiency
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some people who have anemia their blood cells get small depending on what's causing the anemia like an iron deficiency anemia can cause your red blood cells to get small it's called a microtic anemia if your red blood cells look big and you're anemic that may be related to fate or B12