Biomarkers such as Red Blood Cell Count (RBC) are valuable indicators for assessing longevity and overall health. RBC count reflects the oxygen carrying capacity of the blood, which is essential for maintaining cellular function and supporting vital organs. As a longevity expert, I emphasize the importance of monitoring RBC levels to identify potential health issues and optimize longevity. Scientific research shows a correlation between low RBC count and increased mortality risk, making it a crucial biomarker for longevity purposes. By monitoring and managing RBC count, individuals can strive towards optimal health and longevity.