Biomarkers are essential tools in assessing and predicting longevity. Insulin, a hormone produced by the pancreas, is a crucial biomarker for longevity. Elevated levels of insulin have been linked to various age-related diseases such as diabetes, cardiovascular disease, and cancer. Monitoring insulin levels can provide important insight into an individual’s risk for these conditions and their overall health and potential longevity. By understanding and managing insulin levels, individuals can make informed lifestyle choices to promote healthy aging and potentially extend their lifespan. This makes insulin a valuable biomarker in the pursuit of longevity and overall well-being.