If you’re not losing weight fast enough to stay motivated on 1500 calories a day, cut your calories to 1000 a day. If you’re not losing weight fast enough to stay motivated on 1000 calories a day, cut your calories to 800 a day. If you’re not losing fast enought to stay motivated on 800 a day, cut your calories to 500 a day. If your daily calories are 800 or below, you’ll probably need appetite suppressant and anti-craving medication to stay on a diet this low in calories. Always try to keep your carbohydrate intake to 10-20 grams per feeding or less. If you’re ever not losing weight fast enough, before cutting your calories, decrease your carbohydrate intake to 5-10 grams per feeding.