INTRODUCTIONIn Kenya, since 2002 to 2012, there has been significant economic development, which has led to enormous rural-urban migration and class expansion average. Urbanization and economic development have led to new and improved marketing and distribution infrastructure, which has attracted major supermarkets such as Nakumatt, Tusksys, Uchumi, Ukwala and Naivas branches across the country. Their main contribution to food distribution is their expansion into low-income neighborhoods, thereby improving access to suppliers of refined and processed foods, which has influenced the way Kenyans eat (Hawkes 2006). The social and economic transition, which has been taking place since 2002 thanks to the economic development policies adopted by the government of President Mwai Kibaki, has led to the reduction of poverty indices and the expansion of the middle class over the last decade. This has encouraged new habits such as snacking on foods high in fat, sugar and starch. Becoming the norm in Kenya, these 'Westernized' habits were closely linked to the increase in non-communicable diseases such as cancer in the country (Oniang'o, 2003). This study will be carried out with the sole aim of highlighting the impact of lifestyle changes occasioned by the economic transition in Kenya in order to provide a clear picture of the extent to which unhealthy behaviors and harmful exposures are voluntary as as the country's economic opportunities increase. — although it is a complex question still explored by researchers (Suhrcke and Nugent 2006). Cancer is the leading cause of noncommunicable diseases worldwide and GLOBOCAN estimates that 12.7 million new cases of cancer occurred worldwide in 2008. According to Ferlay, Shin and Bray (2010), reported.... .. middle of article .. ....creas cancer risk; however, the associations were positive for higher levels of consumption. This collaborative analysis provided additional evidence of a positive association between heavy alcohol consumption and pancreatic cancer risk. PROBLEM STATEMENT This review was carried out with the sole aim of highlighting the impact of lifestyle changes caused by economic transition. in Kenya from 2002 to 2012 to provide a clear picture of the extent to which changes in unhealthy lifestyles have influenced the prevalence of cancer in Kenya.OBJECTIVES OF THE STUDY1. To review the literature on the impact of lifestyle changes on cancer prevalence in Kenya.2. Comparing cancer prevalence attributed to risky lifestyle factors such as poor diet, physical inactivity, obesity, smoking and alcohol consumption trends in Kenya..