The drastic calorie reduction of fast weight loss diets producing fast weight losses slows the body metabolism. The metabolism decline begins within 24 hours, and in two weeks the metabolic slowdown can be as much as 20 percent. One doctor stated: “Your metabolism will slow to a crawl on so few calories.” You will feel the effects and find yourself irritable and fatigued.
In addition up to 70% of your long-term weight loss will be muscle, not fat. When dieting you want to lose fat, not muscle. Muscle tissue is the bodies best calorie burner. Losing muscle slows your metabolic rate. The metabolic rate is the measure of energy used to maintain routine bodily functions. Example important functions such as breathing and cell repair. This accounts for approximately 60 to 75 percent of energy consumed by the body.
This metabolic decline is why dieters often stop losing weight after a few weeks of severe dieting. One woman, who since she was 16 had kept her weight down by dieting, gained 25 pounds with the birth of her first child but quickly lost it. She then gained 50 pounds after the birth of her second child and could not lose it. 
At one point she went to a weight-loss clinic where she was cut to 500 calories a day. She lost ten pounds the first month, two the second month and nothing the next two months despite faithfully following the program. When her calorie intake was raised to 800 per day, she steadily gained 2 pounds per week till she had gained back the 12 I had so painfully lost.
In addition to a slowed-down metabolism, an enzyme, lipoprotein lipase, that regulates fat storage, may become more active in storing fat after crash dieting. For both these reasons, some people regain lost weight when normal eating is resumed. In fact, the majority regain the weight they lost. Statistics show 95 percent for the very obese and 66 percent overall. The weight regained, however, is mostly fat, not lost muscle, which means a reduced metabolism that encourages more fat storage.
Overweight and obesity is associated with a number of health hazards. It may impair both cardiac and pulmonary function, modify endocrine function, and cause emotional problems. Hypertension, impaired glucose tolerance, and hypercholesterolemia are more common in overweight individuals than in individuals of normal weight.
Thus, it is not surprising that obesity may contribute to acquired disease and mortality in individuals. Yes at hand is hypertension, stroke, type II or non-insulin-dependent diabetes mellitus, some types of cancer, and gallbladder disease. In addition overweight and obesity is also considered a risk factor for atherosclerotic heart disease
Overeating is the simple reason for obesity. There are so many researchers on obesity sounding out the same warning loud and clear “Do not use fast weight loss diets!” and “Do not overeat!” For most overweight and obese people it is their accumulation of excess weight through a prolonged excessive consumption of calories. Cherish your body.
To your weight loss success, health and happiness,
John Schmidt – Weight Loss Nutritionist Coach





































