The hypothalamus, the part of the brain that regulates body weight, there are more than a dozen chemical signals in the brain that tell your body to gain weight, more than another dozen that tell your body to lose it, and the system works like a thermostat, responding to signals from the body by adjusting hunger, activity and metabolism, to keep your weight stable as conditions change.
Hypothalamus, den del af hjernen der regulerer kropsvægt, der er mere end et dusin kemiske signaler i hjernen, der fortæller din krop  at den skal forøge vægten, mere end et dusin der fortæller kroppen,  at den skal tabe det og systemet fungerer som en termostat, der reagerer på signaler fra kroppen ved at justere sult, aktivitet og stofskifte for at forsøge at holde vægten stabil under skiftende forhold.