New Delhi, March 8 -- Every year, millions embark on a diet that promises quick results by slashing calories. But by March or sometimes sooner, the enthusiasm wanes, weight rebounds, and frustration sets in. If weight loss were simply about eating less, most of us would have cracked the code by now. Cutting calories isn't a magic switch; it's a science. There's something deeper at play.

Biology doesn't cooperate with starvation

When you suddenly reduce calorie intake, the body perceives it as potential scarcity. From an evolutionary standpoint, this looks like famine. In response, metabolic hormones shift. "Levels of leptin, the hormone that signals fullness, fall, while ghrelin, the hunger hormone, rises. Your resting metabolic rate sl...