MCV (Mean Corpuscular Volume) is an important biomarker used in longevity research. It measures the average size of red blood cells and can provide valuable insights into overall blood health and potential inflammation or nutrient deficiencies. Specifically, a high MCV can indicate conditions such as vitamin B12 or folate deficiency, while a low MCV may point to iron-deficiency anemia or chronic diseases. Monitoring MCV levels can help identify and address underlying health issues, ultimately contributing to a longer and healthier life. As such, MCV is a key biomarker in assessing and maintaining overall health and longevity.