Final answer:
Diets not included in the Dietary Guidelines for Americans are those that lack balance, variety, and moderation, and do not meet the adequacy of essential nutrients or promote calorie control. These guidelines recommend wholesome, nutrient-rich foods and MyPlate serves as a guide to proper proportions from each food group.
Step-by-step explanation:
The Dietary Guidelines for Americans provide evidence-based recommendations for healthy eating patterns. Diets not included in the guidelines are those that don't support the key factors for nutritional health. These factors include adequacy, balance, calorie control, moderation, and variety. The guidelines specify that a healthy eating pattern should include a rich diversity of vegetables, fruits, grains (at least half being whole grains), low-fat dairy, a variety of protein sources, and oils while limiting saturated and trans fats, added sugars, and sodium.
To facilitate the adoption of these guidelines, the U.S. Department of Agriculture (USDA) developed MyPlate, an easy-to-use guide for planning a healthy diet. According to MyPlate, half of the plate should comprise fruits and vegetables, one-quarter should have whole grains, and one-quarter protein, accompanied by low-fat or non-fat dairy products. Any diet that does not align with these principles is not included in the Dietary Guidelines for Americans. For example, diets that prioritize highly processed foods, excessive sugars or saturated fats, or lack variety and adequate nutrients would not be recommended.