I have developed all my research and teaching work at the University of Zaragoza. Almost all of my publications, books, directed theses, and projects study the effects of oxidative stress on living beings and the ability of melatonin to prevent them. My predoctoral training was completed with three research stays: 1) 4 months, University of Granada, Darío Acuña-Castroviejo (supervisor); 2) 25 months, Department of Cellular and Structural Biology, Health Science Center at San Antonio, University of Texas, USA, Russel J. Reiter (supervisor); and 3) 5 months, Department of Experimental Biology of the University of Porto (Portugal), Henrique Almeida (supervisor). I lead the Physiology of Aging and Oxidative Stress research team, which is integrated into the Thematic Network for Cooperative Research on Aging and Fragility of the FIS. I currently lead the B37_20D Aging and Oxidative Stress group. I have participated in 29 research projects, 17 of them as a leader. I have published 80 scientific articles, 74 of them in international journals in the Journal Citation Reports, obtaining an accumulated index of 195,147, with an average impact factor of 2,605 and an H-factor of 32. Most of these publications are in the first and second quartiles (Q1: 26 and Q2: 30). The average number of citations is 32.45 per article. Likewise, I have participated in the writing of 13 book chapters and I have presented 158 communications to national and international conferences.