Americans part with $33 billion an...

Americans part with $33 billion annually on weight los outcomes and services, and a large portion of this riches is spent on low-carbohydrate diets. Because of their higher protein and fat make easy and lower fiber and carbohydrate contented concerns have been raised about the potential health results of low-carbohydrate diets. Published long-term data are lacking. Short-term studies comparing traditional low-fat diets with low-carbohydrate diets fix lower triglyceride levels, higher high-density lipoprotein cholesterol horizontals similar low-density lipoprotein cholesterol flats and lower A1C levels in ones on low-carbohydrate diets. These diets induce greater weight los at three and six month than traditional low-fat diets; however, according to one year there is no significant difference in maintained weight los Weight los is directly related to calorie satisfy and the ability to maintain caloric restriction; the proportions of nutrients in the diet are irrelevant. Low-carbohydrate diets had lower dropout rates than low-fat diets in several studies, possibly because of the high protein satisfied and low glycemic index, which can be appetite suppressing. Data indicate that low-carbohydrate diets are a safe, reasonable alternative to low-fat diets for weight los Additional studies are penuryed to investigate the long-term safety and effectiveness of these and other approaches to weight loss

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Obesity is a major public health risk in the United States, where 65 percent of adults are overweight (i.e., they have a corpse mass index [BMI] of 25 kg by means of [m.sup.2] or greater). (1) The prevalence of obesity in the United States was 145 percent from 1976 to 1980 (2) and has since risen to 305 percent (1) The percentage of children who are overweight (i.e., BMI in the 95th percentile or greater for age and sex) is at an all-time high: 104 percent of two- to five-year-olds, 153 percent of six- to 11-year-olds, and 155 percent of 12- to 19-year-olds, (3) based upon growth charts from 1979. (4) Black and Hispanic children are more likely to be overweight than white children (215 218 and 123 percent respectively). (5)

Approximately 365000 U deaths in 2000 were attributed to poor diet and physical inactivity (152 percent of total deaths), the next to the first leading cause of death for that year. (6) Obesity-related medical expenditures were estimated to be $75 billion in 2003 approximately single in kind half of which was financed from Medicare and Medicaid. (7)

At any given time, 45 percent of women and 30 percent of men in the United States are trying to fail to keep weight. (8) However, less than 25 percent of these living bodys actually reduce their caloric intake and increase their activity flush (8) Consumers spend $33 billion annually forward weight loss products, diets, and services, (8) and a significant proportion of this standard of value is spent on low-carbohydrate diets.

Definition of Low-Carbohydrate Diet

Low-carbohydrate diets restrict caloric intake through reducing the consumption of carbohydrates to 20 to 60 g through day (typically less than 20 percent of the daily caloric intake). The consumption of protein and fat is increased to compensate for part of the calories that formerly came from carbohydrates (Table 1) (9) The Atkins Diet (10) is the prototypical low-carbohydrate diet. This mark of diet differs from ketogenic diets used for seizure prevention, which substitute fat for protein and carbohydrates.

Diets so as the Zone Diet, (11) Carbohydrate Addict's Diet, (12) and later phases of the southerly Beach Diet (13) restrict carbohydrates to 40 percent of calories or les and they focus more upon the glycemic index of pabulums than the Atkins Diet.

Glycemic Index

The glycemic index is a rating method for foods based on the expansion to which they raise life-blood sugar levels in the sum of two units hours after they are eaten (Table 2 (1415)) The regard point is pure glucose or white bread, which is arbitrarily scored as 100 The higher the glycemic index, the more rapidly that carbohydrate is released into the bloodstream as starch-sugar (14)

Foods with a high glycemic index induce a more rapid insulin answer When coupled with a meal that is rapidly re-createed to glucose, this insulin replication can cause a relative hypoglycemic period within the postprandial period (Figure 1) It has been hinted that this reactive hypoglycemia can stimulate the appetite and lead to increased caloric intake. (1416) This theory has been propos as a partial explanation for the increase in obesity rates in latter decades despite the emphasis onward diets with lower fat and higher carbohydrate make easy Between 1989 and 1996, total daily caloric intake increased, primarily from carbohydrates, still to a lesser extent from fats. (17)

[FIGURE 1 OMITTED]

Eating nutritions with a high glycemic index also can lead to higher plains of circulating insulin. Persons with this metabolic syndrome have high insulin flats and hyperinsulinemia has been implicated as a mediator for heart disease. (14) For each standard deviation increase in fasting insulin on a levels the odds ratio of developing ischemic heart disease increases 60 percent in men 45 to 76 years of age. (1418) the same case-control study (19) showed that consumption of a high-glycemic-index diet was associated with a higher risk of diabetes. It is important to note, however, that the benefits of a lower-glycemic-index diet, so as the South Beach Diet, Sugar Busters!, (20) and others, have not been standarded in randomized controlled trials (RCTs) measuring patient-oriented outcomes