Total protein is a key biomarker used in assessing longevity. It provides crucial information about an individual’s overall health and nutritional status. High levels of total protein can indicate good muscle mass and strength, which are important factors for maintaining independence and mobility as we age. On the other hand, low levels of total protein may indicate malnutrition or a decline in organ function. Monitoring total protein levels can help identify potential health issues early on, allowing for interventions that can help improve overall longevity and quality of life. As such, total protein is a valuable biomarker for assessing and promoting longevity.