Final answer:
Generous restaurant portions are problematic because they make it difficult to track calorie intake, can result in unbalanced meals with all the servings of a food group in one go, and contribute to an excessive calorie intake leading to weight gain and obesity.
Step-by-step explanation:
Generous restaurant portions pose several problems for maintaining a healthy diet. First, large portions make it much harder to track calorie intake, which can contribute to overeating and weight gain. Additionally, oversized meals may contain all the recommended servings for a food group in one go, making it difficult to eat balanced meals throughout the day. Finally, because portion sizes in restaurants have increased, as well as the usage of SOFAS (solid fats and added sugars), the risk of consuming more calories than needed is higher, possibly exacerbating sedentary lifestyle effects and contributing to the rising obesity rates. Therefore, it is crucial to monitor food portions and opt for meals lower in saturated fat and calories to maintain a healthy diet.