Ladislav Vaško, assoc. prof. DVM., PhD is working as associate professor at the Department of Medical and Clinical Biochemistry, Faculty of Medicine, Pavol Jozef Šafárik University in Košice. Since graduation at the University of Veterinary Medicine in Košice in 1974, he had been working on the Clinic of Internal Diseases. He completed doctoral studies by dissertation thesis in 1979. From 1980 to 2008 he taught chemistry at the Department of Biochemistry and Toxicology. In 1989, the Ministry of Education of the Slovak Republic appointed him associated professor in Biochemistry, in 2006 habilitated to associate professor in Physiology and Morphology. Since March 2008 he has been working at the Faculty of Medicine in Košice. He is the author of 3 monographs, 9 textbooks, and more than 400 scientific and conference papers. Currently deals with the effects of humic acids on organisms with simultaneous intake of toxic substances.