If you are determined to lose weight, start keeping a check on your calories. Note down the calories which you are consuming in a day, this can help you in figuring out your diet regime in a better way. Kim eats only 1,800 calories per day as per her nutritionist Colette Heimowitz’s statement to Elle magazine. Setting a calorie count varies from person to person, it largely depends on your age, height, current weight, goal weight and your daily activity level. It is preferable to consult your doctor before deciding on setting a specific calorie intake.