Vitamin B12 and Folate Deficiency: The Causes of Elevated MCV
                                
                                
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                                    4 min read                                
                            
                                According to a study, up to 3.6% of the general population may have macrocytosis, or elevated MCV, indicating larger than normal red blood cells. This abnormal finding is most commonly caused by a deficiency in either vitamin B12 or folate, which impairs proper red blood cell development. Understanding the underlying nutritional cause is key to effective diagnosis and treatment.