Fitness experts often promote the idea that calories are all that matter when it comes to wait loss, or wait gained. Thes od calories is all that matters - but what's more important is controlling how many calories we take. When you restrict calories alone, your body responds by burning fewer calories in which case your caloric deficit disappears. But if you're bought, if you eat 15 hundred calars instead of two thousand, but your body goes from burning two thousand to burning 15 hundred, you still haven't lost weight.