The human body was designed to live in a completely different environment than the one in which we live today. Our prehistoric ancestors were hunters – gatherers who alternated between times of feast and times of famine. During the warm months, when food was abundant, our ancestors would gorge on fresh meat, seeds, roots, nuts, fruits, and berries. (Take note: When they wanted to put on body fat, they ate carbs along with protein and fat.) In the winter, when food was scarce, they lived primarily on dried meat and whatever else they could forage. And sometimes they went without food for days at a time and survived due to stored body fat. Fortunately, when food was in short supply, their bodies adapted by requiring less energy.
Modern men and women may be light years ahead of our prehistoric ancestors intellectually, but the fact is, we still have the same bodies and the same metabolism. And when you go on a diet and cut back on your intake of calories, you trigger the same biochemical response. In fact, about 72 hours after starting a typical weight – loss program, your body begins to produce hormones – so – called “starvation hormones” – that resist burning fat. Over time, your body becomes more efficient and requires fewer calories to do the same amount of work. Inevitably, your metabolism slows down so that you, like your prehistoric ancestors, can run on less energy. This may have been great for them, but it has created untold misery for millions of modern dieters. When you’re off the weight – loss program, you are stuck with a slower metabolism than when you started, so you will begin to rapidly gain weight when you start eating more food.
So in other to maintain the lost weight and keep off excess fat, you have to look at your food pattern as not a diet but a lifestyle change.