lifebeginsrightnow,
We know that fasting slows down the metabolism, (one quarter to two fifths) which can last for four to six weeks after the fast is broken. A few
pounds of weight usually returns in the next week or two after breaking the fast as the body replenishes the fluid and electrolytes that it lost while fasting.
However, a diet that primarily consists of fresh fruits, vegetables, whole grains, and beans is a diet with less than 10 percent of calories from fat and (the main culprit why people put on weight): the fat will just melt away from your body if you adhere to the above way of eating.
The problem is when diets attempt to keep your caloric intake very low, your body slows down its metabolic rate because it senses the need to conserve fuel. The more your food intake drops, the harder your body will try to keep from losing its fat. On a 500-calorie diet your metabolic
rate can drop 20 percent below normal. This reaction is frustrating to dieters, who often find that the longer they diet, the harder it becomes to lose weight and the reason I am not a fan of calorie-counting.
The unfortunate result of denying oneself food as a means of diet control is that when the dieter goes back to eating normally, the fat more easily accumulates because of a low metabolic rate. This leads to the yo-yo phenomenon in which dieters lose some weight, only to rebound to a heavier weight than they started with!!!
On the above way of eating you can eat as much food as you like, (according to appetite). In fact, when you are eating foods that are rich in water-soluble fibers but contain less than 10 percent of calories from fat, you can stuff yourself and still enjoy substantial weight loss.
So, if your diet post-fast is eaten only according to genuine hunger/appetite and is of a "high-water-content", you will still lose weight if desired.
Your bodys main fuel source is carbohydrates (complex carbs and not refined) and the glucose that is derived from them, so a low-carb route means that you are denying your body the means by which it derives its energy: less energy means less expenditure of calories. etc etc etc.
Hope that helps.
Chrisb1.