I know a dietitian, who once told me as I struggle with weight "Did you ever see a fat person in a nazi concentration camp, you eat less calories and you will lose weight" Harsh comment but true, If you are at a constant weight, add up the calories that maintain your usual weight, then reduce the amount of calories, She advised me to aim at losing one pound a week, yes it worked, I lost 2 stone that way but the amount of calories I could eat was only 1700 calories, boy was I hungry all the time, the meales barely touched the sides of my stomach. BTW I put it all back on again