From the USDA – United States Department of Agriculture: The Dietary Guidelines for Americans give science-based advice on food and physical activity choices for health. The 2005 edition of the Dietary Guidelines remain the current guidelines until the 2010 edition is released.
The Dietary Guidelines describe a healthy diet as one that emphasizes fruits, vegetables, whole grains, and fat-free or low-fat milk and milk products; includes lean meats, poultry, fish, beans, eggs, and nuts; and is low in saturated fats, trans fats, cholesterol, salt (sodium), and added sugars.