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GqArtguy · 03-05-2006, 01:14 PM

[ QUOTE ]
This sweetener also doesn't spur production of insulin to make the body "process" calories, nor does it spur leptin, a substance that tamps down appetite, as other carbohydrates do, explained Dr. George Bray of the Pennington Biomedical Research Center in Baton Rouge, La.

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What he forgets to mention is that since fructose doesn't raise insulin, the body also burns more fat after fructose feeding compared to other sugars (obviously pending on who youre listening to).

End result = no difference

Macronutrient disposal during controlled overfeeding with glucose, fructose, sucrose, or fat in lean and obese women.

McDevitt RM, Poppitt SD, Murgatroyd PR, Prentice AM.

Medical Research Council Dunn Clinical Nutrition Centre, Cambridge, United Kingdom. r.mcdevitt@au.sac.ac.uk

BACKGROUND: Previous short-term studies (< or =6 h) showed differences in energy expenditure (EE) and macronutrient oxidation in response to overfeeding with different types of dietary carbohydrate. This finding could have implications for obesity. OBJECTIVE: We used 96-h continuous whole-body calorimetry in 8 lean and 5 obese women to assess metabolic disposal (energy dissipation and glycogen or fat storage) of a controlled excess of dietary energy supplied as different carbohydrate sources or as fat. DESIGN: Five dietary treatments were applied in random order: energy balance (control) and overfeeding by 50% of energy requirements with fat (O(fat)) or predominantly with glucose, fructose, or sucrose (O(cho)). Macronutrient oxidation rates were assessed from nonprotein gaseous exchanges. Net macronutrient balances were calculated as cumulative differences between intake and oxidation. RESULTS: Increased EE in response to overfeeding dissipated 7.9% of the energy excess with a variation in EE of <1.7% across overfeeding treatments (NS). EE during the O(fat) treatment significantly exceeded that during the control treatment in the lean but not in the obese women. There were no significant differences between lean and obese women in macronutrient oxidation or balances, so data were pooled. O(cho) induced glycogen storage on day 1 ( approximately 100 g) but thereafter progressively stimulated carbohydrate oxidation so that balance was reached on days 3 and 4. Fat oxidation was proportionately suppressed. Of the excess carbohydrate, 74% was oxidized; there were no significant differences between the various O(cho) treatments. O(fat) stimulated fat oxidation by 18% and suppressed carbohydrate oxidation. On average, 12% of the excess energy was stored as glycogen and 88% as fat; there was no significant difference between overfeeding treatments. CONCLUSION: There was no significant difference in fat balance during controlled overfeeding with fat, fructose, glucose, or sucrose.
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[ QUOTE ]
"There's a lack of fullness or satiety. The brain just seems to add it on," said Dr. Louis Aronne, a Weill-Cornell Medical College doctor who is president of the Obesity Society.

Two studies by Penn State nutritionist Barbara Rolls illustrate this. One gave 14 men lemonade, diet lemonade, water or no drink and then allowed them to eat as much as they wanted at lunch. Food intake didn't vary, no matter what they drank.

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Do we really have to go over the flaws of this approach?

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Then there is the "jelly bean study." Purdue University researchers gave 15 men and women 450 calories a day of either soda or jelly beans for a month, then switched them for the next month and kept track of total consumption. Candy eaters ate less food to compensate for the extra calories. Soda drinkers did not.

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Alright so you give someone jellybeans or soda in the amount of 450 cals, then let them do whatever they normally do in a diet without controlling for those calories or the type of individual, or activity levels? Holy quantum leaps batman!
[img]/images/graemlins/laugh.gif[/img]

03-05-2006, 01:14 PM	#11 (permalink)
GqArtguy Purgatorio Join Date: Oct 2002 Posts: 4,521	Re: HFCS debate... [ QUOTE ] This sweetener also doesn't spur production of insulin to make the body "process" calories, nor does it spur leptin, a substance that tamps down appetite, as other carbohydrates do, explained Dr. George Bray of the Pennington Biomedical Research Center in Baton Rouge, La. [/ QUOTE ] What he forgets to mention is that since fructose doesn't raise insulin, the body also burns more fat after fructose feeding compared to other sugars (obviously pending on who youre listening to). End result = no difference Macronutrient disposal during controlled overfeeding with glucose, fructose, sucrose, or fat in lean and obese women. McDevitt RM, Poppitt SD, Murgatroyd PR, Prentice AM. Medical Research Council Dunn Clinical Nutrition Centre, Cambridge, United Kingdom. r.mcdevitt@au.sac.ac.uk BACKGROUND: Previous short-term studies (< or =6 h) showed differences in energy expenditure (EE) and macronutrient oxidation in response to overfeeding with different types of dietary carbohydrate. This finding could have implications for obesity. OBJECTIVE: We used 96-h continuous whole-body calorimetry in 8 lean and 5 obese women to assess metabolic disposal (energy dissipation and glycogen or fat storage) of a controlled excess of dietary energy supplied as different carbohydrate sources or as fat. DESIGN: Five dietary treatments were applied in random order: energy balance (control) and overfeeding by 50% of energy requirements with fat (O(fat)) or predominantly with glucose, fructose, or sucrose (O(cho)). Macronutrient oxidation rates were assessed from nonprotein gaseous exchanges. Net macronutrient balances were calculated as cumulative differences between intake and oxidation. RESULTS: Increased EE in response to overfeeding dissipated 7.9% of the energy excess with a variation in EE of <1.7% across overfeeding treatments (NS). EE during the O(fat) treatment significantly exceeded that during the control treatment in the lean but not in the obese women. There were no significant differences between lean and obese women in macronutrient oxidation or balances, so data were pooled. O(cho) induced glycogen storage on day 1 ( approximately 100 g) but thereafter progressively stimulated carbohydrate oxidation so that balance was reached on days 3 and 4. Fat oxidation was proportionately suppressed. Of the excess carbohydrate, 74% was oxidized; there were no significant differences between the various O(cho) treatments. O(fat) stimulated fat oxidation by 18% and suppressed carbohydrate oxidation. On average, 12% of the excess energy was stored as glycogen and 88% as fat; there was no significant difference between overfeeding treatments. CONCLUSION: There was no significant difference in fat balance during controlled overfeeding with fat, fructose, glucose, or sucrose. __________________ [ QUOTE ] "There's a lack of fullness or satiety. The brain just seems to add it on," said Dr. Louis Aronne, a Weill-Cornell Medical College doctor who is president of the Obesity Society. Two studies by Penn State nutritionist Barbara Rolls illustrate this. One gave 14 men lemonade, diet lemonade, water or no drink and then allowed them to eat as much as they wanted at lunch. Food intake didn't vary, no matter what they drank. [/ QUOTE ] Do we really have to go over the flaws of this approach? [ QUOTE ] Then there is the "jelly bean study." Purdue University researchers gave 15 men and women 450 calories a day of either soda or jelly beans for a month, then switched them for the next month and kept track of total consumption. Candy eaters ate less food to compensate for the extra calories. Soda drinkers did not. [/ QUOTE ] Alright so you give someone jellybeans or soda in the amount of 450 cals, then let them do whatever they normally do in a diet without controlling for those calories or the type of individual, or activity levels? Holy quantum leaps batman! [img]/images/graemlins/laugh.gif[/img]