Katrin Sak, MSc, PhD, Dip.Nut.Med is an Independent Senior Researcher working in the NGO Praeventio, Estonia. She received her BSc (1996), MSc (1997) and PhD degrees (2001) in Bioorganic Chemistry in the University of Tartu, Estonia. In the years 2001-2004, she was a postdoctoral fellow in the Free University of Brussels, Belgium. Her full academic CV is available at: https://www.etis.ee/CV/Katrin_Sak/eng/. Katrin Sak is a biochemist working in the field of anticancer action of plant polyphenols, flavonoids. Her research field comprises the studies of natural polyphenolic anticancer agents, especially the effects of flavonoids in different malignant models. Her scientific activity is focused also on the interactions between plants-derived flavonoids and conventional anticancer treatment modalities, including chemotherapy, hormonal therapy, targeted therapy and radiotherapy. Katrin Sak is the author of eight monographs/handbooks/textbooks (seven in English), 12 chapters in the edited topic collections and 132 scientific articles published in the international peer-reviewed journals (with 74 articles where she is the first or the last author). Her H-index is 37 and there are currently more than 6750 citations to her scientific works. Her most important works are the monographs (all published by Nova Science Publishers, Inc., New York): (1) Flavonoids in the Fight against Upper Gastrointestinal Tract Cancers. 2018. 331 pp; (2) Plant Flavonoids Affect Cancer Chemotherapeutic Efficacy: A Handbook for Doctors and Patients. 2019. 428 pp; (3) Dietary Flavonoids Interfere with Cancer Radiotherapy. 2019, 146 pp; (4) Plant Flavonoids Against Metastasis: New Concepts For Cancer Treatment. 2021, 385 pp; (5) Combating Canine Cancers with Phytochemicals. 2021, 141 pp; (6) How Plant Flavonoids Affect the Outcome of Hormonal and Biological Cancer Therapies: A Handbook for Doctors and Patients. 2022. 311 pp; and (7) Fundamentals of Flavonoids and Their Health Benefits. A Textbook for Undergraduate, Graduate, and Postgraduate Students. 2024. 327 pp. The author pages of Katrin Sak are available at https://www.amazon.com/author/katrinsak and https://novapublishers.com/writer/katrin-sak. Katrin Sak is actively involved in the editorial work around the world. She has been active as an editor of several international collections: (1) Current Aspects in Chemopreventive Strategies (Tuli HS, Yerer MB, Sak K, eds.). Lausanne: Frontiers Media SA 2021. 131 pp; (2) Current Aspects in Chemopreventive Strategies, Volume II (Tuli HS, Yerer MB, Sak K, eds.). Lausanne: Frontiers Media SA 2022. 166 pp; and (3) Plant Extracts as an Infinite Resource for New Anticancer Agents (Sak K, ed.). New York: Open Exploration Publishing Inc. 2023. Currently, she is the guest editor of two special collections “Molecular Mechanisms and Intervention Options in Metastatic Spread of Cancer" at Exploration of Targeted Anti-tumor Therapy and "Current Approcahes to Malignant Tumors of the Nervous System" at Exploration of Neuroscience. Katrin Sak has also been intensively participated in the peer reviewing of articles at different journals. She is the Associate Editor for Pharmacology of Anti-Cancer Drugs at Frontiers in Pharmacology and Frontiers in Oncology. Katrin Sak is a highly devoted scientist. In addition to all her scientific achievements, she is also active as an expert reviewer and evaluator of the Research, Development and Innovation Funds of many countries (see https://www.etis.ee/CV/Katrin_Sak/eng/). Katrin Sak is a highly motivated scientist with excellent problem-solving, mentoring and leadership skills. The hobbies of Katrin Sak include reading and meditation.