Mai-Lis Hellénius, MD, Ph.D., professor in cardiovascular prevention at the Karolinska Institutet, Stockholm, Sweden. Mai-Lis Hellénius was born 1953. MD at Karolinska Institutet 1978. Certified specialist in Family Medicine 1985. In 1995 Mai-Lis Hellénius defended her thesis “Prevention of cardiovascular disease - Studies on the role of diet and exercise in the prevention of cardiovascular disease among middle aged men.” The thesis was based on a controlled randomized trial and thereby she was among the first in the world to scientifically evaluate advice on lifestyle. Associate professor in 1999. Professor in cardiovascular prevention focusing lifestyle in 2006. She has for more than 40 years been working both as a clinician, a researcher and a teacher in the area of lifestyle medicine. She was among the first physicians in the world initiating physical activity on prescription in 1987. Mai-Lis Hellénius has 260 publications and 169 of them are publications in peer review journals. Mai-Lis Hellénius has been the tutor of 16 Ph.D. students who have defended their thesis. All Ph.D. projects have focused physical activity, lifestyle and prevention. She has been engaged in the writing of national and Nordic guidelines for diet and physical activity as well as prevention of cardiovascular disease. She is a member of many expert committees both nationally and internationally and she has been invited speaker at international meetings more than 100 times. Mai-Lis Hellenius has served as a faculty opponent on 36 occasions of both Swedish and international universities. She has been awarded in Sweden and from several international universities. Year 2017 she was invited to give the Morris-Paffenbarger Honorary lecture at the opening session of American College of Sports Medicine meeting in Denver, USA. She has written several textbooks in lifestyle medicine and cardiovascular prevention for the professional audience. She has also developed a web-based educational program for health care professionals as well as the public, which was launched in 2009 from the Karolinska Institutet (www.sundkurs.se). She is a requested lecturer for professional as well as for the public. Mai-Lis Hellénius has also written several popular science books on nutrition, physical activity and a healthy lifestyle. Several of them have been awarded in Sweden and internationally. Mai-Lis Hellénius received the Dun Gifford's Award from Gourmand International Cookbook Awards for one of the books. The books “Vitally important” about lifestyle and health and Vitally important-the Cookbook, won the Gourmand International Cookbook Award in 2017 and 2019. In 2021 the book Vitally important was awarded as the Best during 25 years in its category and a new book about health for seniors also won a prize the Gourmand Cookbook International Award.