Dr. Katrin Sak is a biochemist born in Viljandi, Estonia in 1975. She received her BSc (1996), MSc (1997) and PhD degrees (2001) in Bioorganic Chemistry from the University of Tartu, Estonia. In the years 2001–2004, she was a postdoctoral fellow in the Free University of Brussels, Belgium. In 2011–2012, she completed a special training in nutritional oncology and acquired Dip.Nut.Med degree in the Health Schools Australia. Dr. Sak’s research field comprises the study of natural polyphenolic anticancer agents, especially the effects of flavonoids in different malignant models. Her scientific activity is also focused on the interactions between plant flavonoids and different anticancer treatment modalities. She is the author of eleven monographs/ handbooks/ textbooks (eight in English), numerous chapters in edited topic collections and more than 150 scientific articles published in international peer-reviewed journals. Her most important works are the monographs "Plant Flavonoids against Metastasis: New Concepts for Cancer Treatment" (2021) and "Flavonoids: Supplements for Health and Well-Being", a trilogy about interactions of plant flavonoids with conventional cancer treatment modalities (2019–2022), and the university textbook "Fundamentals of Flavonoids and Their Health Benefits. A Textbook for Undergraduate, Graduate, and Postgraduate Students" (2024). She is ranked among the world`s top 2% researchers based on the Stanford University and Elsevier data.