The role of nutrition is especially important in certain 'lifestyle' diseases that impact disproportionately on ethnic minority populations. The aim of this paper is to review the evidence of risk, health outcomes and interventions for certain diseases that affect the UK's largest ethnic minority group (South Asians) in order to help professionals better address the needs of this diverse population. Research evidence is presented on factors influencing access to services by ethnic minority populations and the changing UK policy background for public health and preventive care. The available research base on obesity, diabetes and CVD is discussed. Conditions such as type 2 diabetes, which are more prevalent among the South Asian population, are associated with poorer health outcomes and appear to exhibit links to diet and nutrition that start in childhood or even before birth; all making preventive care important. Obesity is a major risk factor and it appears that BMI thresholds may need to be lower for South Asians. Targeted interventions to improve diet and outcomes in the South Asian population also appear promising. Recent moves to promote access to evidence of ethnicity and health and to improve the cultural competence of organisations are discussed. Health professionals will increasingly need to promote lifestyle changes in a manner that meets the needs of a diverse population in order to address future public health challenges. Nutritionists and other professionals will need to ensure that interventions are culturally appropriate and involve engagement with extended family members and communities.Ethnic minorities: South Asians: Diabetes and obesity: Nutrition: Evidence-based practice Health professionals are crucial in the fight against a number of conditions that impact disproportionately on ethnic minority populations. Approximately 12 . 5% of UK residents come from a non-white British ethnic back ground, and in some urban areas the proportion is approximately 50% (1) . According to the 2001 Census, nearly half (45 %) of the minority ethnic population in England lives in the Greater London area, where they form 29 % of the population overall (2) . South Asians currently represent approximately 40 % of the UK ethnic minority population, with individuals or their families, mainly originating from India, Pakistan and Bangladesh.With continued migration from South Asia, Europe and elsewhere, Britain has an increasingly multi-ethnic population. This can present a number of challenges to health care professionals when dealing with public health issues linked to diet and lifestyle. This paper focuses on specific conditions that are known to be more prevalent in people of South Asian origin, and are linked to diet and lifestyle. These include type 2 diabetes, CVD and CHD. It should be borne in mind, however, that there are other conditions, for example, osteomalacia and rickets, which are also linked to diet and lifestyle in the South Asian population (3)(4)(5) . The role of public health and preventive care ar...