Since most people need to consume between 1,600 and 3,000 calories to maintain their weight, following a 1,200 calorie diet plan can result in fast weight loss — but it's also highly restrictive ...

The evidence behind "calories in, calories out" is strong but research continues to prove that restrictive meal plans — like low-carb or low-fat — are ineffective and unsustainable long term.

It works exactly the same way in the body. And most people need between 2000 and 3000 calories a day. And an Oreo cookie has 50 calories, you eat two of them, that's a 100. You eat 10 of them that ...