2015 43(2 ) 105 A Comprehensive and Updated Overview on the Cancer- Preventive Nutrition. * Hasan Basri SAVAS 1 . Fatih GULTEKIN 1 . Mesut GULER 2 . 1. Suleyman Demirel University, Medical Faculty, Department of Medical Biochemistry. Isparta. Turkey. 2. Suleyman Demirel University, Medical Faculty, Isparta. Turkey. Corresponding author: Hasan Basri SAVAS. M.D. Address: Suleyman Demirel University Medical Faculty, Department of Medical Biochemistry, Isparta, Turkey. Tel: +905075240737. E-mail: drhasanbasrisavas@hotmail.com *: Presented as a poster at the 2nd International Medical Student Congress in Isparta, Turkey 2014. Conflict of interest: The authors declare no conflict of interest. Abstract: Cancer is a term used to describe a number of severe diseases where multi-factors are involved. Cancer, which is a term derived from the Latin word “Crab” as the disease grab on and do not let go, dates back to about 3000 BC. Nutrition is the function of food intake and usage of necessary food elements for growth, development, reproduction, tissue renewal and energy processing. Cancer is one of the most dreadful diseases of the 21st century and one in every five people come across cancer at some point of their life’s. Studies have shown that almost 90% of the cancers are associated with the life style and environmental factors. Among these factors, diet is one of the most important one. It is estimated that dietary factors contribute to 35% of all cancers without taking environmental factors into account and to 75% when environmental factors are taken into account. Nutrition is one of the most important reasons of cancer. We aimed to show a comprehensive and updated overview to the cancer- preventive nutrition. Keywords: Nutrition, cancer, obesity, insulin resistance, food additive, genetically modified food.