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  #1   ^
Old Sat, Nov-14-09, 03:41
Demi's Avatar
Demi Demi is offline
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Plan: LC Maintenance
Stats: 215/147/150 Female 5'10"
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Location: UK
Default Good news for slimmers as scientists rethink calorie counting

Quote:
From The Times
London, UK
14 November, 2009


Good news for slimmers as scientists rethink calorie counting

Slimmers, rejoice — those forbidden sweet treats or extra bags of crisps may no longer be off-limits. Scientists advising the Government say that the calorie counts used as the basis of diet plans and healthy-eating advice for the past 18 years may be wrong.

According to a draft report by the Scientific Advisory Committee on Nutrition (SACN), the recommended daily intake of calories — currently 2,000 for women and 2,500 for men — could be increased by up to 16 per cent, suggesting that some adults could safely consume an extra 400 calories a day (equivalent to an average-sized cheeseburger, or two bags of ready-salted crisps).

The committee, made up of some of Britain’s leading nutritional experts, says that its report provides a much more accurate assessment of how energy can be burnt off through physical activity.

However, health campaigners and consumer experts warned that the Department of Health and the Food Standards Agency (FSA) could seek to “sweep this report under the carpet”, as it could send out mixed messages in the middle of an obesity epidemic.

Ministers are considering the introduction of new food-labelling schemes that would highlight the calorie content of foods relative to guideline daily amounts (GDAs).

Industry sources expressed concern that revising figures and estimates on which the GDAs were based could cause confusion among consumers and mistrust of scientific advice. The FSA has been evaluating for two years new methods of labelling, including a “traffic light” scheme to colour-code unhealthy food.

Existing guidelines on energy intake required for good health have formed the basis of food labelling and dietary advice from doctors and nutritionists since 1991. If the committee’s proposals are accepted some foods would be upgraded to a healthier rating.

The draft proposals, seen by The Times and The Grocer magazine, are due to go out for a 14-week consultation before final recommendations are made. The report comes two weeks after the Government’s chief drugs advisor was sacked by the Home Secretary for “crossing a line” by publicly criticising existing policy.

About 60 per cent of British adults are overweight or obese, with growth in the nation’s waistlines being blamed on sedentary lifestyles as well as excessive eating. The cost of overweight and obese individuals to the NHS is estimated to be £4.2 billion a year and the Department of Health has pledged to cut levels of childhood obesity partly through its £375 million “Change4Life” strategy.

Tam Fry, of the National Obesity Forum, said it was a “dangerous assumption” to say that adults could safely consume an extra 400 calories a day. “This is not a green light to eat yourself silly,” he said.

The last significant study on energy use, carried out by the Committee on the Medical Aspects of Food and Nutrition Policy in 1991, was based on observational studies, with students being shut in a room for a week having their breathing measured, a method prone to underestimating “normal” levels of physical activity.

SACN assessed studies using the Double Labelled Water technique, which measures how much carbon dioxide the body has produced converted into equivalent values of energy.

Adam Leyland, editor of The Grocer, said: “The ramifications for the industry are significant, to say the least. All the UK’s labelling schemes, including GDAs and traffic lights, are based around the 1991 energy report.”
http://www.timesonline.co.uk/tol/li...icle6916617.ece


Draft Energy Requirements report 'scientific consultation' - November 2009: http://www.sacn.gov.uk/reports_posi...ember_2009.html
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  #2   ^
Old Sat, Nov-14-09, 03:45
Demi's Avatar
Demi Demi is offline
Posts: 17,667
 
Plan: LC Maintenance
Stats: 215/147/150 Female 5'10"
BF:
Progress: 105%
Location: UK
Default

Quote:
From The Times
November 14, 2009

Nutritional study could send misleading messages to women

Amanda Ursell, Times Nutritionist


A few years ago I took part in a study of the eating habits of 100 overweight women. I asked them to tell me everything that they had eaten the previous day. The results were analysed at Oxford Brookes University.

It was a relatively small study — a single day, a snapshot — but we seemed to get a more honest account than we often do when we ask people to keep food diaries. The average woman in the group was consuming 3,487 calories a day, the highest figure was 6,161.

My main worry with these findings from the Government’s Scientific Advisory Committee on Nutrition is not the figures but how they will be interpreted. I am surprised by the figures but I can’t argue with them. One response will be: “Scientists got it wrong, we can’t trust them.” Another will be: “We can eat more.”

These figures take a group of people and average out the needs of them. Some require more, some require less.

But 60 per cent of us are already eating more calories than we need. A proportion of these people may think that the “more calories” message applies to them.

Then there are people who are the correct weight. They are probably eating the right amount. I would advise them to stay as they are. If you were maintaining a normal weight and you increased your intake by the amount that this report suggests, you could gain up to 2st in a year.

Then there are those low-calorie diets. Are they now considered far too low in calories? A study at Tufts University in Boston has shown that you have to be fairly radical for those diets to work, you have to reduce to 1,200 calories a day.

I suspect that the people who are a normal weight will ignore the figures. The real worry is those who are already overweight, people such as the 100 women I spoke to. Their daily diet included crisps, takeaways and fizzy drinks. The surprising thing was how easy it was to take on so many calories in a single day. I worry that the message of this story will be: “You can eat more.”
http://www.timesonline.co.uk/tol/li...icle6916479.ece
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  #3   ^
Old Sun, Nov-15-09, 07:57
Rocketguy Rocketguy is offline
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Plan: Atkins
Stats: 245/193/170 Male 67 inches
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I think the situation described highlights that the "dietary science" as practiced has long been second rate science.

The concern is that it isn't clear that the revisions are a workable step towards achieving "Good Science" in the dietary science farce.

This should be a time for a more thorough "housecleaning", and a fairly public one.

The diet issues are probably more complex than a PYRAMID or a 3-COLOR STOPLIGHT.

Thanks for the postings.
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  #4   ^
Old Tue, Nov-17-09, 07:30
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Merpig Merpig is offline
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Plan: no grain/no sugar/OD
Stats: 372/270/172 Female 67 inches
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Progress: 51%
Location: NJ
Default

I agree that calorie counting is not at all what it's cracked up to be, but adding some crisps or sweet treats to your daily allotment is also not the way to lose any weight! IMHO of course.
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  #5   ^
Old Tue, Nov-17-09, 11:45
RobLL RobLL is offline
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Posts: 970
 
Plan: generalized low carb
Stats: 205/180/185 Male 67
BF:31%/14?%/12%
Progress: 125%
Location: Pacific Northwest
Default

Imagine astronomy without calculus or the laws of gravity. Nutrition at this stage is in a similar position, it is an order of magnitude or two more complicated than astronomy, and we do not yet possess the tools to really describe what is going on in the human body. There are great scientists working on most of the aspects of the problem. There is probably the need to establish how several hundred pieces of our metabolism are interconnected before nutrition is as scientific as astronomy.
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  #6   ^
Old Tue, Nov-17-09, 12:29
Nancy LC's Avatar
Nancy LC Nancy LC is offline
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Posts: 28,330
 
Plan: Hedonic Paleo
Stats: 209.5/170.4/165 Female 5'8"
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Location: San Diego, CA
Default

Totally agree, Rob. And people put so much faith in the science and believe it's all true (whatever they read). I wish at least the media would practice some skepticism.
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  #7   ^
Old Tue, Nov-17-09, 12:33
Seejay's Avatar
Seejay Seejay is offline
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Plan: Optimal Diet
Stats: 272/259.5/122 Female 62 inches
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And I wish more people like us would cry foul at shoddy science and shoddy reporting. I would not have repeated the article for example.

Wouldn't greeting shoddy news with a great silence, be better? Or at least not get them more web hits by reposting the url.
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  #8   ^
Old Tue, Nov-17-09, 13:50
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Valtor Valtor is offline
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Posts: 1,247
 
Plan: paleonu.com KurtHarris MD
Stats: 337/260.0/200 Male 6' 1"
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Progress: 56%
Location: Québec, Canada
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Quote:
Originally Posted by RobLL
Imagine astronomy without calculus or the laws of gravity. Nutrition at this stage is in a similar position, it is an order of magnitude or two more complicated than astronomy, and we do not yet possess the tools to really describe what is going on in the human body. There are great scientists working on most of the aspects of the problem. There is probably the need to establish how several hundred pieces of our metabolism are interconnected before nutrition is as scientific as astronomy.

This is very well said.

I'm always learning new things about human metabolism and the more I know the less I seem to know. I am currently losing weight, but I had to tweak my metabolism with Cortisone and Cytomel to get it going. I'm learning a great deal on this adventure, but no doctors can really help me, I have to go by symptoms, because this is still the best we have for most things (labs are not enough).

Science is still too young in this field and it has been slowed down so much by all the scientists blindly accepting the "Gluttony and sloth" obesity hypothesis. It's a shame, but we will get there.

Patrick
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