INTRODUCTIONIn Kenya, significant economic development occurred from 2002 to 2012, leading to massive rural-urban migration and the expansion of the middle class. Urbanization and economic developments have led to new and improved marketing and distribution infrastructure, which has attracted large supermarkets such as Nakumatt, Tusksys, Uchumi, Ukwala and Naivas branches across the country. Their main contribution in food distribution is due to expansion towards low-income classes, thus improving suppliers' access to refined and processed foods, which has influenced the way Kenyans eat (Hawkes 2006). The social and economic transition, underway since 2002 through the economic development policies adopted by the government of President Mwai Kibaki, has led to the reduction of poverty rates and the expansion of the middle class in the last decade. This promoted new habits such as snacking on foods high in fat, sugar and starch. Having become the norm in Kenya, these “Westernized” habits had been strongly linked to the rise of non-communicable diseases such as cancer in the country (Oniang'o, 2003). This review will be carried out with the sole purpose of highlighting the impact of lifestyle changes caused by the economic transition in Kenya to provide a clear picture of the extent to which unhealthy behaviors and harmful exposures are voluntary as economic opportunities increase of the country. - although this is a complex issue still being studied by researchers according to (Suhrcke and Nugent 2006). Cancer is the leading cause of non-communicable diseases worldwide and GLOBOCAN estimates that in 2008 there were 12.7 million new cases of cancer worldwide. According to Ferlay, Shin and Bray (2010), indicated... half of the document.. ....risk of pancreatic cancer; however, associations were positive for higher levels of consumption. This collaborative analysis provided further evidence of a positive association between excessive alcohol consumption and pancreatic cancer risk. PROBLEM STATEMENT This review was carried out with the sole purpose of highlighting the impact of lifestyle changes caused by the economic transition in Kenya from 2002 to 2012 to provide a clear picture of the extent to which lifestyle changes do not health outcomes have influenced the prevalence of cancer in Kenya. OBJECTIVES OF THE STUDY1. Review the literature on the impact of lifestyle changes on cancer prevalence in Kenya.2. Compare cancer prevalence attributed to risky lifestyle factors such as unhealthy diet, physical inactivity, obesity, tobacco use and alcohol consumption tendency in Kenya.