UIBC (Unsaturated Iron Binding Capacity) is a biomarker used in longevity research to assess the body’s ability to transport iron. It measures the amount of iron that can be bound to transferrin, a protein responsible for iron transport in the blood. Low levels of UIBC may indicate iron overload, while high levels could suggest iron deficiency. Maintaining optimal iron levels is important for overall health and longevity, as both excess and deficiency can have negative impacts on various physiological processes. By monitoring UIBC levels, individuals can make informed decisions about their iron intake and supplementation to support their longevity goals.