It&#x27;s not that far off. If you&#x27;re not looking at calories in and calories out first, you&#x27;ll be disappointed. Thermodynamics doesn&#x27;t cease to operate inside the human body.<p>Sure, if you&#x27;re tracking your food intake closely, maintaining a significant deficit, and not losing weight, talk to a doctor about your thyroid. If you&#x27;re putting in hours in the gym and eating a lot and not gaining any muscle, talk to your doctor about your testosterone level. But if you&#x27;re looking to hormones and whatnot first, you&#x27;re probably just deluding yourself.