how many calories should lunch contain
Be calorie smart 400-600-600. Calories are a measure of the amount of energy in food and drinks. Knowing how many calories are in your food can help you balance the energy you put in your body with the energy you use, which is the key to maintaining a healthy weight. The calorie rule of thumb is simple! 1  Just eat around 400 kilocalories (kcal) for breakfast (including any drinks and accompaniments) 2  600kcal for lunch (including any drinks and accompaniments) and another.  600kcal for your evening meal (including any drinks and accompaniments)