Nutrition plays a vital role in the prevention of chronic diseases such as diabetes, cardiac diseases, obesity and cancer. Evidence has shown that low-glycaemic index (GI) and low-carbohydrate diets are effective in the management of type-2 diabetes, and the role of vitamins, unsaturated fatty acids, and bioactive compounds in chronic disease management have been the subject of key research. Nutritional interventions are critical and central in the management of these chronic conditions. Many chronic diseases are the result of poor nutrition. Often, these diseases can be prevented or delayed with healthier eating habits.