High Fructose Corn Syrup
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New research shows that there are big differences in how the sugars fructose and glucose are metabolized by your body. Overweight study participants showed more evidence of insulin resistance and other risk factors for heart disease and diabetes when 25 percent of their calories came from fructose-sweetened beverages instead of glucose-sweetened beverages.
A study1 looked at 32 overweight or obese men and women. Over a 10-week period, they drank either glucose or fructose sweetened beverages totaling 25 percent of their daily calorie intake.
Both the groups gained weight during the trial, but imaging studies revealed that the fructose-consuming group gained more of the dangerous belly fat that has been linked to a higher risk for heart attack and stroke. The fructose group also had higher total cholesterol and LDL ("bad") cholesterol, and greater insulin resistance.
Ironically, the very products that most people rely on to lose weight -- low-fat diet foods2,3 -- are often those that contain the most fructose!
Fructose is Metabolized Differently
Despite the fact that this and other studies show clear differences in how fructose is metabolized by your body, researchers like principal investigator Peter J. Havel, PhD, and cardiologist James Rippe (who is also a consultant for the Corn Refiners Association), claim that the findings do not prove that high fructose corn syrup (HFCS) is worse for your health than other sugars.
That simply makes no sense.
They keep claiming that high fructose corn syrup (HFCS) is chemically similar to other widely used sweeteners, including table sugar (sucrose), honey, and even sweeteners made from concentrated fruit juices.
Clearly Not True
High fructose corn syrup (HFCS) is a highly processed product that contains similar amounts of unbound fructose and glucose. Sucrose, on the other hand, is a larger sugar molecule that is metabolized into glucose and fructose in your intestine.
And whereas the glucose in other sugars are converted to blood glucose, fructose is a relatively unregulated source of fuel that your liver converts to fat and cholesterol.
There is over 35 years of hard empirical evidence, in addition to this latest study, showing refined man-made fructose like high fructose corn syrup (HFCS) metabolizes to triglycerides and body fat, not blood glucose.
The danger of that is that fructose does not stimulate your insulin secretion, nor enhance leptin production, which is thought to be involved in appetite regulation. This was detailed in one of the most thorough scientific analyses4 published to date on this topic.
Because insulin and leptin act as key signals in regulating how much food you eat, as well as your body weight, dietary fructose can also contribute to increased food intake and weight gain.
So, if you need to lose weight, fructose is one type of sugar you’ll definitely want to avoid, particularly in the form of high fructose corn syrup (HFCS).
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High Fructose Corn Syrup
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