Meat is a natural part of a balanced diet. Meat is useful in ensuring a good balance of energy, protein, vitamins and minerals within the diet. Meat contains a number of essential nutritional elements - protein, for instance, has a high biological value. When measured by energy unit, protein is more satisfying than carbohydrates and fat. As the availability of lean cuts is wider than ever, avoiding excess fat is quite easy. Meat is a good source of vitamin D, which prevents osteoporosis. Additionally, meat contains a number of vitamins such as B1, B2, B6, B12 and niacin as well as iron.