continuing to post blogs that didn't make it to the Herald website because of a computer glitch
National Public Radio has been a haven of calm, rational discussion and objective reporting, but recently they put out a piece on high-fructose corn syrup that must have had the big food processors and corporate corn farmers cheering. They noted that many people remain highly suspicious of this common food additive, thinking it contributes to obesity and obesity-related ailments. But according to the American Dietetic Association, this is an urban myth, NPR said. Fructose is just another kind of sugar-the food industry wants to re-label high-fructose corn syrup as "corn sugar"-and people don't need to fear. You must remember this, a calorie is just a calorie, as it were.
I wrote in to the program, pointing out that in February, the Princeton University Department of Psychology and the Princeton Neuroscience Institute had published in the journal Pharmacology the results of two experiments investigating the relationship between the consumption of high-fructose corn syrup and obesity.
In the first, male rats were given a standard diet plus either water with sucrose (table sugar) in the same concentration as commercially available soft drinks or water with high-fructose corn syrup in a concentration about half that as in soft drinks.
A Yahoo health news summary of the results said, ". 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."
Sucrose is glucose plus fructose, but not all fructose is equal. "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."
The second experiment was the first long-term study of the effects of high-fructose corn syrup consumption on laboratory animals. For six months, some rats were fed standard rat chow, while others had access to high-fructose corn syrup. The latter gained 48 percent more weight. The experimenters monitored fat deposition and triglyceride levels as well as weight, and found that the weight-gain rats were exhibiting "metabolic syndrome," the complex of weight-gain-related symptoms that in humans is often the predecessor of adult-onset diabetes (diabetes 2).
Princeton psychology professor Bart Hoebel, who specializes in the neuroscience of appetite, weight, and sugar addiction, was quoted as saying, "Some people have claimed that high-fructose corn syrup is no different than other sweeteners when it comes to weight gain and obesity, but our results make it clear that this just isn't true, at least under the conditions of our tests. When rats are drinking high-fructose corn syrup at levels well below those in soda pop, they're becoming obese -- every single one, across the board. Even when rats are fed a high-fat diet, you don't see this; they don't all gain extra weight."
Visiting research associate Nicole Avena, at that time with Rockefeller University and now a professor at the University of Florida, put it plainly: "Our findings lend support to the theory that the excessive consumption of high-fructose corn syrup found in many beverages may be an important factor in the obesity epidemic." (And it isn't just beverages: read the labels on food products and sometimes it's as hard to find processed food without high-fructose corn syrup as it is to find gasoline without added ethanol.)
The previously mentioned news report cited some well-known statistics about obesity in America. Back in the 1970s, when high-fructose corn syrup was introduced as a cost-effective sweetener, about 15 percent of Americans were obese; today, according to the National Centers for Disease Control, more than 30 percent are obese.
Hoebel and Avena had teamed up to do research before. Looking at sucrose-table sugar is sucrose-they found that sucrose can be addictive, having effects on the brain similar to some drugs of abuse.
The Mayo Clinic's online health advice site said, "So far, research has yielded conflicting results about the effects of high-fructose corn syrup. For example, various early studies showed an association between increased consumption of sweetened beverages (many of which contained high-fructose corn syrup) and obesity. But recent research - some of which is supported by the beverage industry - suggests that high-fructose corn syrup isn't intrinsically less healthy than other sweeteners, nor is it the root cause of obesity."
Hoebel and Avena's research on high-fructose corn syrup was supported by the U. S. Public Health Service.
We have seen how those who stand to lose a lot of money if the theory of human-induced climate change is right have promoted "expert" statements that the evidence is mixed and the issue was still in doubt. That view has been resoundingly rejected by the vast majority of responsible researchers. Before that, claims that pesticides and herbicides and fungicides were damaging the environment in general and human health in particular met similar "expert" opposition-while the average American sperm count plummeted. Probably the high-fructose corn syrup issue will go through the same weary, predictable pattern, while thousands meet unnecessary deaths.
Meanwhile, we will continue to be disposal units for whatever kinds of garbage factory farming generates. I would say "lab rats," but lab rats are treated better.
A month later, I haven't heard back from National Public Radio, other than an auto-reply that my email had arrived there.
The title of this commentary quotes a war cry heard by infantry soldiers in the Pacific Theater in World War II. But the "G.I." in this case actually is the American gastro-intestinal tract.