<human>:  What are the nutrition guidelines for adults in US?
<bot>: The nutrition guidelines for adults in the United States are based on the Dietary Guidelines for Americans, which are published every five years by the U.S. Department of Agriculture (USDA) and the U.S. Department of Health and Human Services (HHS). These guidelines recommend that adults eat a variety of nutrient-dense foods, including vegetables, fruits, whole grains, low-fat dairy products, lean proteins, and healthy oils. They also suggest limiting foods and beverages high in added sugars, saturated fat, and salt. Additionally, the guidelines encourage adults to be physically active for at least 150 minutes a week, and choose portions that make up the right amount of calories for one's age, gender, and activity level.