In Summary A balanced diet and good nutrition are not only important as a source of energy for our active lives, but are also critical for our defence against diseases. Carbohydrates, proteins, fats, vitamins, minerals, fibre and water are the main groups of nutrients, which together but in variable amounts, make up a balanced diet. Malnutrition and poor diets are the leading cause of death and one of the top two risk factors for non-communicable diseases (NCDs) worldwide.