To prevent increasing morbidity and mortality due to obesity-related T2DM and cardiovascular disease in developing countries, there is an urgent need to initiate large-scale community intervention programs focusing on increased physical activity and healthier food options, particularly for children. International health agencies and respective government should intensively focus on primordial and primary prevention programs for obesity and the metabolic syndrome in developing countries.

South Asians are at higher risk than White Caucasians for the development of obesity and obesity-related non-communicable diseases (OR-NCDs), including insulin resistance, the metabolic syndrome, type 2 diabetes mellitus (T2DM) and coronary heart disease (CHD). Rapid nutrition and lifestyle transitions have contributed to acceleration of OR-NCDs in South Asians. Differences in determinants and associated factors for OR-NCDs between South Asians and White Caucasians include body phenotype (high body fat, high truncal, subcutaneous and intra-abdominal fat, and low muscle mass), biochemical parameters (hyperinsulinemia, hyperglycemia, dyslipidemia, hyperleptinemia, low levels of adiponectin and high levels of C-reactive protein), procoagulant state and endothelial dysfunction. Higher prevalence, earlier onset and increased complications of T2DM and CHD are often seen at lower levels of body mass index (BMI) and waist circumference (WC) in South Asians than White Caucasians. In view of these data, lower cutoffs for obesity and abdominal obesity have been advocated for Asian Indians (BMI; overweight 423 to 24.9 kg m À2 and obesity X25 kg m À2 ; and WC; men X 90 cm and women X80 cm, respectively). Imbalanced nutrition, physical inactivity, perinatal adverse events and genetic differences are also important contributory factors. Other differences between South Asians and White Caucasians include lower disease awareness and health-seeking behavior, delayed diagnosis due to atypical presentation and language barriers, and religious and sociocultural factors. All these factors result in poorer prevention, less aggressive therapy, poorer response to medical and surgical interventions, and higher morbidity and mortality in the former. Finally, differences in response to pharmacological agents may exist between South Asians and White Caucasians, although these have been inadequately studied. In view of these data, prevention and management strategies should be more aggressive for South Asians for more positive health outcomes. Finally, lower cutoffs of obesity and abdominal obesity for South Asians are expected to help physicians in better and more effective prevention of OR-NCDs.

India is facing an "epidemic" of diet-related non-communicable diseases (DR-NCDs), along with widely prevalent undernutrition resulting in substantial socioeconomic burden. The aim of this paper is to review secular trends in food groups and nutrient intake, and implications for DR-NCDs in India so as to understand optimal choices for healthy diets for the prevention of DR-NCDs. The literature search was carried out in PubMed (National Library of Medicine, Bethesda, MD, USA) and Google Scholar search engines up to April 2011. A manual search for all other references, national and medical databases was also carried out. Nutrition transition over the past 30 years (1973-2004), has resulted in a 7% decrease in energy derived from carbohydrates and a 6% increase in energy derived from fats. A decreasing intake of coarse cereals, pulses, fruits and vegetables, an increasing intake of meat products and salt, coupled with declining levels of physical activity due to rapid urbanization have resulted in escalating levels of obesity, atherogenic dyslipidemia, subclinical inflammation, metabolic syndrome, type 2 diabetes mellitus, and coronary heart disease in Indians. Studies also suggest that adverse perinatal events due to maternal nutritional deprivation may cause low-birth weight infants, which, coupled with early childhood "catch-up growth", leads to obesity in early childhood, thus predisposing to NCDs later in life. In view of rapidly increasingly imbalanced diets, a multisectoral preventive approach is needed to provide balanced diets to pregnant women, children and adults, and to maintain a normal body weight from childhood onwards, to prevent the escalation of DR-NCDs in India.