Tips to Gain Weight with a Fast Metabolism

10. Eat calorie- and nutrient-dense foods

Nutritious, high-calorie foods are your best bet for healthy weight gain. Make the right choices for energy-dense foods which include nuts, whole grains, dried fruit, full-fat dairy, healthy fats and oils, meat, and tubers (potatoes, sweet potatoes, etc.). If gaining weight is the number one priority, it might be a good idea to stay away from low-calorie vegetables for a little while. Consistency is key—so continue to pack in those calories, and keep lifting weights!