Preface

José Alberto Ávila-Funes, Department of Geriatrics, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, México D.F., Mexico
Silvestre Frenk-Freund, Nutrition Genetics Unit, Instituto Nacional de Pediatría, Mexico City, Mexico

The elderly population is increasing worldwide. Never before in history have there been so many persons aged 60 years or older. This has multiple consequences and challenges for health systems and governments. Therefore, the promotion of research on aging is imperative, not only from a biological viewpoint but also from social, economic, and political standpoints. A better understanding of these phenomena will allow the formulation of new recommendations focused on the aging population and based on a solid scientific background, far from obsolete stereotypes.