Why Should You Stop Dieting? Because Diets Don't Work — Experts Explain 7 Reasons Why

Leptin is the hormone that sends the "I'm full" message to your body, so you stop eating. Researchers from The Biggest Loser study also found that dramatic weight loss caused a decrease in leptin levels, which lead to increased cravings and hunger. It's impossible to fight these strong physical urges, making it more difficult to continue with a low-calorie diet.