That’s in part because when you restrict calories, you restrict nutrients. As a result, you lose weight on a crash diet, but much of it is lean, healthy muscle tissue. With less muscle, your body’s metabolism is set at a lower point. So when you go off the diet, even if you eat the exact same number of daily calories as you ate before, you’ll actually gain more fat than you originally carried.
How does fasting produce these benefits? Professor Valter Longo of USC, one of the leading researchers on fasting and longevity, hypothesizes that fasting forces your body to recycle many of its immune cells, particularly white blood cells. Then your body works hard to replenish its white blood cells, essentially re-setting parts of your immune system. Longo is also the inventor of the fast-mimicking diet, where you eat a special diet for 5 days every month, one that makes your body think you're fasting even though you're getting adequate calories and nutrients. (See Alice Walton's story in Forbes for more about that.)
A mixture of lemon juice, water, cayenne pepper, and maple syrup, this drink is meant to jump-start your metabolism and give you enough calories and carbohydrates to get through the day. Cayenne pepper is a metabolic booster, while maple syrup is an unprocessed, natural sugar which provides your body with energy. And because lemons contain antioxidants, they help to flush toxins out of your system.
In a small skillet heat the remaining ½ teaspoon olive oil on medium low. Whisk the egg whites and eggs together with a tablespoon of water until light and airy and add to the small skillet. Let cook slowly undisturbed until ½ of the eggs have set. Use a spatula to gently lift one side of the omelet so that the runny eggs can pool below, then lay back down the cooked eggs and top the entire top of the omelet with cheese.