When people lose weight, their bodies sometimes slow down more than expected, burning fewer calories at rest — and this might be why some folks struggle more than others to keep the weight off.

Past studies that said obese people burn fewer calories after eating might have been misleading because they compared obese people with unusually active lean people or included diabetic patients who burn more calories at rest.

The more your body slows down its calorie burning after weight loss, the more likely you are to eat more than you burn — which makes it easier to gain weight back.

After losing weight, the body slows down calorie burning to save energy — but eating more protein stops this slowdown, so the body burns calories at the expected rate again.

If you're stuck at the same weight even though you're eating right and working out, moving more throughout the day—like fidgeting, standing, or walking—and checking for hidden health issues might help you start losing weight again.

The more your body slows down its calorie burning after losing weight, the more likely you are to eat more than you burn — which makes you gain weight back.