Francisco P. Peixoto is a graduate of biochemistry, from the University of Coimbra, Coimbra, Portugal, in 1992. He received his M.S. degree in biotechnology from the Instituto Superior Técnico (IST), Technical University of Lisbon, Lisbon, Portugal in 1994, and received his Ph.D. degree in 2002, from the University of Trás-os-Montes and Alto Douro, Vila Real, Portugal. The Habilitation degree was awarded in 2010 from the University of Trás-os-Montes and Alto Douro for his research and teaching work in oxidative stress, mitochondrial bioenergetics, and toxicology. Present investigation interests are toxicological and health properties of nutraceuticals and exercise, as an adjunct to a classical therapeutic approach, using mitochondria as the study's focus. Changes in cellular functionality and antioxidant system in response to environmental toxicants with a particular focus on microplastics. Biological and antioxidant activities of natural and new synthetic compounds. Francisco Peixoto is an Associate Professor at the Department of Biology and Environment at the University of Trás-os-Montes and Alto Douro and a Researcher in the Centre Chemistry of Vila-Real.