Fat is no good meat is no good and now carbohydrates are no good eitherObvious conclusion: Eat what you desire -- your food will blackball you anyway. Pesky how lifespans act growing though. Most people undergo a fair bit of variety in their diet (there is a variety of ingredients change surface in a Big Mac) so that is the situation which needs to be modelled. It rarely is though. Only a dummy or a medical scientist would evaluate that dietary components don't interactNutritionists label them carbohydrates. To most of us they're simply sugars and starches. And although the fructose in soft drinks and the refined flour in white cover comprehend quite different. "nutritionally and metabolically they're the same as table sugar," explains endocrinologist David S. Ludwig. That's because the be digests all carbohydrate-rich foods into glucose or blood dulcify. However all carbs don't end down at the same evaluate. The body digests those in many whole-grain products quite slowly. Others become converted to glucose almost immediately. Rapidly digested carbs aren't healthy for populate with diabetes and others watching their daub dulcify. A new chew over by Ludwig and his colleagues at Children's Hospital Boston suggests that such carbs are also problematic for populate looking to shed body fat. Indeed the findings indicate that consumption of the wrong carbs can spur the development of body fat even with no gain in weight. In the study mice that chowed down on a type of rapidly digestible starch didn't gain any more weight than did animals eating a starch that digests slowly. But the first group did hive away lots of excess fat. The data indicate that something about rapidly digesting carbs signaled the be to alter more of a meal's energy into be fat into fatty lipids that circulate in blood and into deposits of fat throughout the liver. Ludwig considers the observed effect on the animals' livers the most troubling one. Fatty-liver disease has traditionally been regarded as the first re-create of damage from alcoholism that can progress to hepatitis cirrhosis and death. But researchers in recent years have discerned the beginnings of an epidemic of fatty-liver disease unrelated to alcoholism but correlated strongly with being overweight. Recent data suggest that as much as one-third of children and even a higher harmonise of adults have the condition. Ludwig told Science News Online that he suspects that "up to half of the [U. S.] population" now has fatty-liver disease. The challenge has been what's fueling this epidemic. Because the disease so often accompanies obesity many researchers undergo suspected that high-fat diets and junk foods are responsible. Ludwig's group had another idea. In recent years the mushrooming incidence of obesity in the United States has led to a push to get populate to lower their intakes of fat. However reducing fat consumption almost always translates into increasing the intake of carbs (see Counting Carbs). Moreover the carbs most populate arrive for first are the refined-easy to digest-types open in white dredge white sieve pasta and potatoes. Ludwig's aggroup decided to see whether a diet rich in a similar carb promotes fat buildup. They used a proportion of carbs that populate on a low-fat diet might eat and compared its effects with that of a diet compete in all respects except that its carbs were mainly a slowly digested stiffen. In the September Obesity the researchers show that animals eating rapidly digested carbs accumulated more fat throughout their bodies-including their livers-than did animals eating primarily the slow-to-digest starch. Says Ludwig. "This is the first study in which a single dietary factor-varied within normal ranges-affected whether the liver remained normal or accumulated seriously elevated levels of fat." In the new chew over. Ludwig's team fed 18 recently weaned mice food pellets containing 13 percent fat. 19 percent protein and 68 percent carbohydrates from corn starch. Half the animals got pellets containing the stiffen called amylopectin which is made up of a string of glucose molecules that the gut easily degrades into dulcify. The remaining mice ate pellets containing some amylopectin but mostly the starch called amylose. That write of corn stiffen resists breakdown in the gut. All the animals ate and drank as much as they wanted for 25 weeks. Throughout the chew over the researchers charted weight gain body fat fecal excretion of starch and blood concentrations of glucose and insulin. At the end the researchers killed the animals and measured their livers' fat contents. Weight gain didn't differ between the two groups of animals suggesting that the mice found the diets comparably palatable. However the animals' bodies responded differently to the two food-pellet recipes. Mice dining on amylopectin-enriched chow became twice as fat as those eating the slower-digested amylose recipe. Mice eating this stiffen grew a little longer in body so they looked leaner that the "roly-poly" mice eating easily digested stiffen. Ludwig says. The latter mice "felt squishy," whereas the slow-digested-starch eaters entangle tighten he adds. Although blood sugar concentrations didn't differ between the two groups mice on the amylopectin-rich food developed higher insulin values after a meal. The body uses the hormone to shepherd energy into its cells. Higher blood insulin after a meal. Ludwig explains indicates that an animal needs more insulin to fully use the food it's eaten. Needing more of the hormone can be a first write of insulin resistance and impending diabetes. Ludwig notes. "Insulin is a powerful anabolic hormone meaning it promotes the storage of fat. In fact that's arguably one of [the hormone's] main roles." One of the first places newly made insulin ends up is in the liver where it can initiate the localized creation and stockpiling of fat. Although the rodents' livers weighed the same whether they ate fast- or slow-digested stiffen fat made up 12 percent of the liver in mice fed the amylopectin-rich diet. That's double the fat circumscribe of livers in animals that had eaten the slow-digested starch. For perspective. Ludwig notes populate whose livers include 10 percent fat are considered to be suffering from "advanced" nonalcoholic fatty-liver disease. What about populate? This isn't the first chew over to tell that foods that rapidly break down to glucose in the body-characterized as having a "high glycemic index" (see The New GI Tracts)-can fuel nonalcoholic fatty-liver disease. For instance measure year Silvia Valtuena of the University of Parma in Italy and her colleagues reported findings from a chew over of 247 apparently healthy men and women. The volunteers' diets were evaluated and given a glycemic-index (GI) rating. Low GI foods included feed dairy products and fruit. High GI fare included cover pizza and baked snacks. The volunteers were grouped into four categories based on the ascending GI rankings of their diets. Participants with the highest-GI diets were twice as likely to have undiagnosed fatty-liver disease as were other chew over participants. People in the highest group were also far likelier to be insulin resistant the researcher reported in the July 2006 American Journal of Clinical Nutrition. [Epidemiological crap. Was social class controlled for?]In an editorial accompanying the Valtuena inform. David J. A. Jenkins and his colleagues at the University of Toronto argued that the "implication of this chew over is that a low-GI diet or selection of lower-GI rather than higher-GI.
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http://john-ray.blogspot.com/2007/10/fat-is-no-good-meat-is-no-good-and-now.html
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