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not that good about fructose
Growing evidence suggests consumption of fats and fructose -- a type of sugar found in fruits and in processed beverages such as sodas and juice drinks -- affect the natural action of three important hormones: ghrelin, which is produced by the stomach to stimulate food intake but also recedes when appetite is sated; insulin, produced by the pancreas to regulate the fat cells; and leptin, produced by the fat cells to signal the brain the body is full.
Several studies have suggested that too much fat results in insulin resistance, creating a situation where hormone signaling becomes so gummed up the brain cannot tell the body when to put down the fork. The same appears to hold true for fructose.
"The more fat and fructose you have on your diet, the less effect you have on these hormones that keep your body stable," Peter Havel, an endocrinologist at the University of California at Davis, told United Press International.
"These hormones help keep your body weight stable," he said.
Sugar, like glucose, ignites insulin production, which then helps set off a biochemical chain reaction throughout the body that indicates fullness. Fructose, however, does not stimulate insulin production and this, researchers said, is a crucial link to understanding why some people develop obesity.
"When you drink beverages with lots of fructose ... you're not triggering insulin secretion or leptin" because leptin is dependent on insulin production, Havel explained. Ghrelin levels are not dropping in the stomach, therefore the body is confused. By consuming fructose-heavy products, the body continues to take in calories, but the hormones are not able to tell the body it is full and to stop eating.
Sep 03, 2002 (United Press International via COMTEX)
Growing evidence suggests consumption of fats and fructose -- a type of sugar found in fruits and in processed beverages such as sodas and juice drinks -- affect the natural action of three important hormones: ghrelin, which is produced by the stomach to stimulate food intake but also recedes when appetite is sated; insulin, produced by the pancreas to regulate the fat cells; and leptin, produced by the fat cells to signal the brain the body is full.
Several studies have suggested that too much fat results in insulin resistance, creating a situation where hormone signaling becomes so gummed up the brain cannot tell the body when to put down the fork. The same appears to hold true for fructose.
"The more fat and fructose you have on your diet, the less effect you have on these hormones that keep your body stable," Peter Havel, an endocrinologist at the University of California at Davis, told United Press International.
"These hormones help keep your body weight stable," he said.
Sugar, like glucose, ignites insulin production, which then helps set off a biochemical chain reaction throughout the body that indicates fullness. Fructose, however, does not stimulate insulin production and this, researchers said, is a crucial link to understanding why some people develop obesity.
"When you drink beverages with lots of fructose ... you're not triggering insulin secretion or leptin" because leptin is dependent on insulin production, Havel explained. Ghrelin levels are not dropping in the stomach, therefore the body is confused. By consuming fructose-heavy products, the body continues to take in calories, but the hormones are not able to tell the body it is full and to stop eating.
Sep 03, 2002 (United Press International via COMTEX)
