RT Journal Article T1 Frailty and biological age. Which best describes our aging and longevity? A1 Félix Escalera, Judith A1 Martínez De Toda Cabeza, Irene A1 Díaz del Cerro, Estefanía A1 González Sánchez, Mónica A1 Fuente Del Rey, María Mónica De La AB Frailty and Biological Age are two closely related concepts; however, frailty is a multisystem geriatric syndrome that applies to elderly subjects, whereas biological age is a gerontologic way to describe the rate of aging of each individual, which can be used from the beginning of the aging process, in adulthood. If frailty reaches less consensus on the definition, it is a term much more widely used than this of biological age, which shows a clearer definition but is scarcely employed in social and medical fields. In this review, we suggest that this Biological Age is the best to describe how we are aging and determine our longevity, and several examples support our proposal. PB Elsevier SN 0098-2997 YR 2024 FD 2024-08 LK https://hdl.handle.net/20.500.14352/117830 UL https://hdl.handle.net/20.500.14352/117830 LA eng NO Félix, J., Martínez de Toda, I., Díaz-Del Cerro, E., González-Sánchez, M., & De la Fuente, M. (2024). Frailty and biological age. Which best describes our aging and longevity? [Review of Frailty and biological age. Which best describes our aging and longevity?]. Molecular Aspects of Medicine, 98. Elsevier Ltd. https://doi.org/10.1016/J.MAM.2024.101291 NO This work was supported by the Research Group of Complutense University of Madrid (910379). NO Universidad Complutense de Madrid DS Docta Complutense RD 24 ago 2025