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(Contrived) Study Links High-Carbs and Weight Loss
On 1/28/2004 10:42 PM, kvs wrote:
a HI-CHO diet (18% fat, 19% protein, 63% carbohydrates, and 26 g of fiber per 1000 kcal), They have also fudged the high carb diet to be much higher in fiber. This shows that they know that the problem is high GI carbs and the insulin feedback mechanism but are constructing the study to push a high carb diet. Actually, I think that what they were trying to do was reflect the Dietary Guidelines for Healthy Americans which clearly state, "Choose a variety of grains daily, especially whole grains." I know that we all hate the food pyramid, dietary guidelines, etc. Heck, even the nutritionists that this group regularly bashes hate the food pyramid, but the publications that go along with it do say to eat whole grains and avoid refined grains. http://health.gov/dietaryguidelines/...ry/default.htm -- jmk in NC |
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(Contrived) Study Links High-Carbs and Weight Loss
jmk wrote in message ...
On 1/28/2004 10:42 PM, kvs wrote: a HI-CHO diet (18% fat, 19% protein, 63% carbohydrates, and 26 g of fiber per 1000 kcal), They have also fudged the high carb diet to be much higher in fiber. This shows that they know that the problem is high GI carbs and the insulin feedback mechanism but are constructing the study to push a high carb diet. Actually, I think that what they were trying to do was reflect the Dietary Guidelines for Healthy Americans which clearly state, "Choose a variety of grains daily, especially whole grains." I know that we all hate the food pyramid, dietary guidelines, etc. Heck, even the nutritionists that this group regularly bashes hate the food pyramid, but the publications that go along with it do say to eat whole grains and avoid refined grains. http://health.gov/dietaryguidelines/...ry/default.htm Trying to reflect dietary guidelines? I don't think so. The author was trying to substantiate his own ideas which he happens to have written a book about last May. He's trying to get on the bestsellers list. William J. Evans, PhD: AstroFit: The Astronaut Program for Anti-Aging by William J. Evans (Author), Gerald Secor Couzens (Author) Paperback: 320 pages ; Dimensions (in inches): 0.81 x 8.42 x 5.53 Publisher: Free Press; (May 13, 2003) ISBN: 0743216822 William J. Evans, Ph.D., a pioneer in the field of age reversal for more than twenty years, has worked as an expert adviser to NASA on nutrition and exercise since 1988, and is the former head of the Nutrition, Physical Fitness, and Rapid Rehabilitation Team of the National Space Biomedical Institution. He lives in Little Rock, Arkansas, with his wife and three children. --This text refers to the Hardcover edition. http://www.amazon.com/exec/obidos/tg...glance&s=books There is no science to be found in this study, it is all a snake-oil job to sell books. TC |
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Study Links High-Carbs and Weight Loss -BS
Pat Paris wrote in message . ..
On Wed, 28 Jan 2004 19:40:08 GMT, "Cubit" wrote: I notice OP has no link to a reputable source, and creative stories have been posted on USENET before. Tcoeau has posted an alledged study, but also with no link to a reputable source, like CNN. Did I miss something? When did CNN become a reputable source for anything? This study may not exist. If it does, there are unaccounted for factors. http://www.medscape.com/viewarticle/467707 Jan. 26, 2004 ? An ad libitum high-complex carbohydrate (HI-CHO) diet is effective for weight loss, according to the results of a 12-week, randomized controlled diet study published in the Jan. 26 issue of the Archives of Internal Medicine. "The efficacy of ad libitum low-fat diets in reducing body weight and fat in overweight and obese adults remains controversial," write Nicholas P. Hays, PhD, from the University of Arkansas for Medical Sciences in Little Rock, and colleagues. "[HI-CHO] diets have been extensively recommended to prevent obesity and promote weight loss in overweight individuals, based on evidence suggesting that these diets reduce total energy intake, increase satiation, and are metabolized with less energetic efficiency compared with high-fat diets." Twenty women and 14 men with impaired glucose tolerance were randomized to a control diet consisting of 41% fat, 14% protein, 45% carbohydrates, and 7 g of fiber per 1,000 kcal; a HI-CHO diet consisting of 18% fat, 19% protein, 63% carbohydrates, and 26 g of fiber per 1,000 kcal; or a HI-CHO diet plus endurance exercise four days per week, 45 minutes per day at 80% peak oxygen consumption. Mean age was 66 ± 1 years. Subjects were provided with 150% of estimated energy needs and permitted to consume food ad libitum. The three groups were similar in total food intake, and energy intake remained stable during the 12-week study in all groups. Weight loss was -0.1 ± 0.6 kg in controls, -4.8 ± 0.9 kg (P = .003) in the HI-CHO diet plus exercise group, and -3.2 ± 1.2 kg (P = .02) in the HI-CHO diet without exercise group. Reduction in percentage of body fat was -0.2% ± 0.6%, -3.5% ± 0.7% (P = .01) and -2.2% ± 1.2% (P = .049), respectively. Compared with controls, thigh fat area decreased in the HI-CHO diet (P = .003) and HI-CHO diet plus exercise (P .001) groups. Resting metabolic rate and fat oxidation did not decrease as a result of high carbohydrate intake and weight loss. Because the weight loss in the HI-CHO diet group cannot be explained by any differential in reported energy intake between this group and the control group, the authors suggest that there may be either bias in this method of food intake assessment or the existence of metabolic differences attributable to dietary macronutrient composition differences among groups. "A high-carbohydrate diet consumed ad libitum, with no attempt at energy restriction or change in energy intake, results in losses of body weight and body fat in older men and women," the authors write. "Participants never complained of feeling hungry, an important consideration in the formulation of dietary strategies to promote weight loss and long-term maintenance of a healthy body weight." The National Institutes of Health helped support this study. One of the authors is now with Pfizer Global Research and Development. The authors report no relevant financial interest in this article. Arch Intern Med. 2004;164:210-217 http://www.foxnews.com/story/0,2933,109890,00.html Atkins Attack By Steven Milloy Already-confused dieters are no doubt reeling from reports this week of a new study linking a high-carbohydrate diet with weight loss. Rather than well-conducted scientific research, though, the new study appears to be merely a junk science-fueled attack by government nannies on politically incorrect low-carbohydrate regimens like the Atkins Diet (search). "In the midst of the low-carb craze, a new study suggests that by eating lots of carbohydrates and little fat, it is possible to lose weight without actually cutting calories - and without exercising, either," reported The Associated Press this week. "Revenge of the High-Carb Diet - Ha! It Works, Too" was the Reuters headline. But unlike the sensationalistic media, which tend to limit their reporting of new study claims to regurgitated press releases and sound bites from study authors, I actually read the study in the Jan. 26 issue of the Archives of Internal Medicine. It didn't take long to discover why study subjects on the high-carbohydrate diet lost weight - they ate fewer calories! The researchers divided the 34 study subjects into three groups: a control group of 12 individuals who consumed a low-carbohydrate diet (search); a group of 11 individuals who consumed a high-carbohydrate diet; and a group of 11 individuals who consumed a high-carbohydrate diet and did aerobic exercise. Study subjects were provided with foods constituting 150 percent of their required daily caloric intake and instructed to eat as much as they wanted. Carbohydrates constituted 45 percent of the control groups' calories and about 62 percent for the high-carbohydrate groups. After 12 weeks, the study subjects on the control diet weighed the same as when the study started. But study subjects on the high-carbohydrate diet lost weight: about five pounds on average for those in the high-carbohydrate-only group and about 10 pounds for those in the high-carbohydrate-plus-exercise group. To the study authors and media, these superficial "results" apparently prove that you can lose weight while eating as many carbohydrates as you like - and you don't even have to exercise. It might be a couch potato's fantasy come true - except that the study details tell a different story. As it turns out, study subjects in the high-carbohydrate groups consumed about 400-600 calories less per day than those in the control group. Over the 12-week period of the study, then, the average study subject in the high-carbohydrate group consumed about 42,000 calories less than the average study subject in the control group. Since a pound of fat represents about 3,500 calories, it's no wonder why those in the high-carbohydrate group lost weight. It was because they ate less, not because of any magical effects of a high-carbohydrate diet. Although the media's apparent lack of interest in examining the actual study data is disappointing, the inaccurate description of the study to the media by lead author William J. Evans of the University of Arkansas for Medical Sciences is even more dismaying. He told Reuters that the study subjects ate "around 2,500 calories per day," thereby implying that the only difference in their diets was the amount of carbohydrates. That's just plain misleading. Control group subjects averaged 2,825 calories per day during the 12-week study; high-carbohydrate group subjects averaged 2250 calories per day and high-carbohydrate-plus-exercise subjects averaged 2,413 calories. Such variation over 12 weeks adds up to significant differences in total caloric intake and is most likely what produced the observed weight loss in the high-carbohydrate groups. The study authors then had the audacity to slam low-carbohydrate diets, such as the Atkins diet, as a means to lose weight. "Little evidence exists to support this idea," wrote the study authors. But it appears that there's not even that much evidence in favor of their all-the-carbs-you-can-eat idea. It's no secret that nutrition nannies in the federal government oppose high-protein/low-carbohydrate diets like the Atkins plan ― not because such diets don't work but because their fat-is-OK approach contradicts the nannies' low-fat dietary prescriptions of the last 30 years. (The irony of course is that obesity has supposedly skyrocketed while America went low-fat.) Evans and his group, not surprisingly, were funded by the National Institutes of Health, a government group that claims in bold-face on its Web site that "[High-protein/low-carb diets are] not a healthy way to lose weight!" That may or may not be true. Much more research is needed. Hopefully that research won't be conducted by biased, government-funded research hacks. Steven Milloy is the publisher of JunkScience.com, an adjunct scholar at the Cato Institute and the author of Junk Science Judo: Self-Defense Against Health Scares and Scams (Cato Institute, 2001). |
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