Use iodized salt to prevent iodine-deficiency disorders such as diabetes. 2. Calorie is the unit of measurement used to show the amount of energy derived from the food. 3. Practice proper diet and moderate physical activity to prevent obesity. 4. Limit the intake of salty food to avoid heart-related illness such as hypertension. 5. As an adolescent, we need to take healthy food to perform a heavy task in our daily lives.