i know it doesnt. but that was the results of the study. the article hypothesizes:
"High-fructose corn syrup and sucrose are both compounds that contain the simple sugars fructose and glucose, but there at least two clear differences between them. First, sucrose is composed of equal amounts of the two simple sugars -- it is 50 percent fructose and 50 percent glucose -- but the typical high-fructose corn syrup used in this study features a slightly imbalanced ratio, containing 55 percent fructose and 42 percent glucose. Larger sugar molecules called higher saccharides make up the remaining 3 percent of the sweetener. Second, as a result of the manufacturing process for high-fructose corn syrup, the fructose molecules in the sweetener are free and unbound, ready for absorption and utilization. In contrast, every fructose molecule in sucrose that comes from cane sugar or beet sugar is bound to a corresponding glucose molecule and must go through an extra metabolic step before it can be utilized.
This creates a fascinating puzzle. The rats in the Princeton study became obese by drinking high-fructose corn syrup, but not by drinking sucrose. The critical differences in appetite, metabolism and gene expression that underlie this phenomenon are yet to be discovered, but may relate to the fact that excess fructose is being metabolized to produce fat, while glucose is largely being processed for energy or stored as a carbohydrate, called glycogen, in the liver and muscles."
studies in rats and animals have fairly consistant record of proving to be the same when done in humans.
Food Industry Experts and Journalists Question Princeton Study“So, I’m skeptical. I don’t think the study produces convincing evidence of a difference between the effects of HFCS and sucrose on the body weight of rats. I’m afraid I have to agree with the Corn Refiners on this one. So does HFCS make rats fat? Sure if you feed them too many calories altogether. Sucrose will do that too.”
Marion Nestle, Ph.D., Paulette Goddard Professor of Nutrition, Food Studies and Public Health, New York UniversityMarch 24, 2010, FoodPolitics.com
“The researchers concluded ‘over-consumption of HFCS could very well be a major factor in the ‘obesity epidemic,’ which correlates with the upsurge in the use of HFCS.’ It might be. But to my mind, these experiments hardly prove it.”
Karen Kaplan, Science Staff Writer, Los Angeles Times March 24, 2010, Los Angeles Times blog Booster Shots
“This study is poorly designed and poorly controlled and does not prove or even suggest that HFCS is more likely to lead to obesity than sucrose [table sugar].”
Karen Teff, Ph.D., Associate Director, Institute for Diabetes, Obesity & Metabolism, University of Pennsylvania School of Medicine March 26, 2010, EatingWell.com
“If the rats fed HFCS for 12 hours gained more weight, why didn’t the rats fed HFCS for 24 hours also gain more weight? They got HFCS for a full 12 hours more, yet didn’t gain more weight. This is a glaring inconsistency in the results…an inconsistency that the researchers never tried to explain.”
James Krieger, M.S., Weightology, LLCMay 22, 2010, Weightology Weekly
Gross Errors in Princeton Animal Study on Obesity and High Fructose Corn Syrup
Research in Humans Discredits Princeton StudyFOR IMMEDIATE RELEASE
March 22, 2010
CONTACT: Audrae Erickson
(202) 331-1634
WASHINGTON, DC – A March 22, 2010 press release entitled “A sweet problem: Princeton researchers find that high-fructose corn syrup prompts considerably more weight gain” issued by Princeton University was based on a study that used grossly exaggerated intake levels in rats and incorrectly suggested that such results could have significant meaning for humans.
In the study “High –fructose corn syrup causes characteristics of obesity in rats: Increased body weight, body fat and triglyceride levels,”(1) the authors failed to put into perspective the excessive amount consumed by the rats in their experimental design. Translating the study’s reported rat intakes to human proportions, the calories gained from high fructose corn syrup would be equivalent to about 3000 kcal/day all from that single source. In comparison, adult humans consume about 2,000 calories per day from all dietary sources. Such intake levels for the study animals would be the equivalent of humans drinking a total of 20 cans of 12 ounce sodas per day – a highly unrealistic amount. Moreover, the researchers concluded that the rats gained more weight from high fructose corn syrup than they would have from sugar, yet the researchers had no proper basis for drawing this conclusion since they failed to provide sucrose controls for part of the study’s short-term experiments and no sucrose controls whatsoever were present in any of the long-term experiments.
“Consumers should not be misled by exaggerated studies that feed astronomical amounts of one ingredient to the study subjects, in this case rats. The medical community has long dismissed results from rat dietary studies as being inapplicable to human beings,” stated Audrae Erickson, president, Corn Refiners Association.
“Consumers should rest assured that high fructose corn syrup is safe. The American Medical Association concluded that high fructose corn syrup does not appear to contribute more to obesity than sugar. The American Dietetic Association stated that these two sweeteners are indistinguishable to the human body and are metabolized equivalently,” Erickson noted.
“This study unnecessarily confuses consumers about human metabolism of common sugars in the diet. A sugar is a sugar whether it comes from cane, corn, or beets. Both sugar and high fructose corn syrup are handled the same by the body. No metabolic effects have been found in studies that compare sugar and high fructose corn syrup consumption in humans,” concluded Erickson.
