<human>:  What is the healthiest diet for long-term weight loss?
<bot>: The healthiest diet for long-term weight loss is one that is balanced, contains a variety of nutrient-dense whole foods, and can be sustained over time. It should emphasize plant-based foods like vegetables, fruits, and whole grains, as well as lean proteins, healthy fats, and other nutrient-rich foods. Additionally, it is important to focus on portion control and set realistic goals to help ensure long-term success.