This was sent to me recently and supposedly is an extract from a book called Fat Chance.
Refined sugar (that is, sucrose) is made up of a molecule of the carbohydrate glucose, bonded to a molecule of the carbohydrate fructose — a 50-50 mixture of the two. The fructose, which is almost twice as sweet as glucose, is what distinguishes sugar from other carbohydrate-rich foods like bread or potatoes that break down upon digestion to glucose alone. The more fructose in a substance, the sweeter it will be. High-fructose corn syrup, is 55 percent fructose, and the remaining 45 percent is nearly all glucose. It was created to be indistinguishable from refined sugar when used in soft drinks.
By the end of the 1970s, any scientist who studied the potentially deleterious effects of sugar in the diet, , and talked about it publicly, was endangering his reputation. What has changed since then, other than Americans getting fatter and more diabetic? It wasn’t so much that researchers learned anything particularly new about the effects of sugar or high-fructose corn syrup in the human body. Rather the context of the science changed: physicians and medical authorities came to accept the idea that a condition known as metabolic syndrome is a major, if not themajor, risk factor for heart disease and diabetes. The Centers for Disease Control and Prevention now estimate that some 75 million Americans have metabolic syndrome The first symptom doctors are told to look for in diagnosing metabolic syndrome is an expanding waistline. This means that if you’re overweight, there’s a good chance you have metabolic syndrome, and this is why you’re more likely to have a heart attack or become diabetic (or both) than someone who’s not. lean individuals can have metabolic syndrome, and are also at greater risk of heart disease and diabetes
Having metabolic syndrome is another way of saying that the cells in your body are actively ignoring the action of the hormone insulin — a condition known technically as being insulin-resistant.
1. You secrete insulin in response to the foods you eat — particularly carbohydrates — to keep blood sugar in control after a meal. 2. When your cells are resistant to insulin, your body (your pancreas) responds to rising blood sugar by pumping out more and more insulin. 3. Eventually the pancreas can no longer keep up with the demand “pancreatic exhaustion.” 4. Now your blood sugar will rise out of control, and you’ve got diabetes.
Not everyone with insulin resistance becomes diabetic; some continue to secrete enough insulin to overcome their cells’ resistance to the hormone. But having chronically elevated insulin levels has harmful effects of its own —heart disease, for one. A result is higher triglyceride levels and blood pressure, lower levels of HDL cholesterol (the “good cholesterol”),
Researchers believe the cause of insulin resistance is theaccumulation of fat in the liver. “when you deposit fat in the liver, that’s when you become insulin-resistant.” Feed animals enough pure fructose or enough sugar, and their livers convert the fructose into fat. The fat accumulates in the liver, and insulin resistance and metabolic syndrome follow. Similar effects can be shown in humans, When Tappy fed his human subjects the equivalent of the fructose in 8 to 10 cans of Coke or Pepsi a day — a “pretty high dose,” he says—– their livers would start to become insulin-resistant, and their triglycerides would go up in just a few days. With lower doses, Tappy says, just as in the animal research, the same effects would appear, but it would take longer, a month or more.
So the answer to the question of whether sugar is as bad as Lustig claims is that it certainly could be. It very well may be true that sugar and high-fructose corn syrup, because of the unique way in which we metabolize fructose and at the levels we now consume it, cause fat to accumulate in our livers followed by insulin resistance and metabolic syndrome, and so trigger the process that leads to heart disease, diabetes and obesity. They could indeed be toxic, but they take years to do their damage. It doesn’t happen overnight.
What are the chances that sugar is actually worse than Lustig says it is? One of the diseases that increases in incidence with obesity, diabetes and metabolic syndrome is cancer. Insulin resistance may be a fundamental underlying defect in many cancers, as it is in type 2 diabetes and heart disease. The connection between obesity, diabetes and cancer was first reported in 2004 in large population studies by researchers from the World Health Organization’s International Agency for Research on Cancer. It is not controversial. What it means is that you are more likely to get cancer if you’re obese or diabetic than if you’re not, and you’re more likely to get cancer if you have metabolic syndrome than if you don’t.
To summarize a couple of things that the PLoS One study clarifies. Perhaps most important all calories are not created equal. By definition, all calories give off the same amount of energy when burned, but your body treats sugar calories differently, and that difference is damaging.
And as Lustig lucidly wrote in “Fat Chance,” it’s become clear that obesity itself is not the cause of our dramatic upswing in chronic disease. Rather, it’s metabolic syndrome, which can strike those of “normal” weight as well as those who are obese. Metabolic syndrome is a result of insulin resistance, which appears to be a direct result of consumption of added sugars. This explains why there’s little argument from scientific quarters about the “obesity won’t kill you” studies; technically, they’re correct, because obesity is a marker for metabolic syndrome, not a cause.
The take-away: it isn’t simply overeating that can make you sick; it’s overeating sugar. We finally have the proof we need for a verdict: sugar is toxic.
