Konstantinos Farsalinos is a physician and research associate at the University of Patras and the University of West Attica in Greece. His field of expertise is public health. He has been conducting laboratory, clinical, and epidemiological research on smoking, tobacco harm reduction, and nicotine products as principal investigator since 2011. He authored the first systematic review on the e-cigarette safety/risk profile, published in 2014.

Additionally, he has performed research and published studies on heated-tobacco products. His findings have been presented at major international scientific congresses, and his studies were used in preparing the regulatory framework on e-cigarettes by the European Union in 2014.As of early 2024, he has published more than 100 studies and articles in international peer-reviewed scientific journals, mostly about smoking, tobacco harm reduction, and alternative-to-smoking nicotine products. He has presented at more than 80 international conferences and was the handling editor and author of a book titled Analytical Assessment of E-Cigarettes, published by Elsevier in 2017. In November 2020, he was declared a Highly Cited Researcher 2019 by the Web of Science, a list of researchers (6,200 scientists out of 9 million examined) with the highest impact in global science in 21 scientific fields in the past decade. During the Covid-19 pandemic, he published 10 peer-reviewed articles and several preprints about Covid-19, including the association between smoking, nicotine, and Covid-19.‍