Eat the right number of calories for how active you are, so that you balance the energy you consume with the energy you use. If you eat or drink too much, you’ll put on weight. If you eat and drink too little, you’ll lose weight. The average man needs around 2,500 calories a day (10,500 kilojoules). The average woman needs 2,000 calories (8,400 kilojoules). Most adults are eating more calories than they need, and should eat fewer calories.
Eat a wide range of foods to ensure that you’re getting a balanced diet and that your body is receiving all the nutrients it needs.