Re: High Protein Diet helps keep weight off


G'day G'day Oleg,

Thank you for this information especially the hypothesis relating to
the relative importance of protein but not GI when it comes to long
term WEIGHT control. GL makes more sense than GI for T2s seeking
blood glucose level control even though they are related. We don't
even know the GI of many vegetables which we do know from out own
experience have low GLs.

Now an issue not dealt with in this research paper is that apparently
the type of protein matters. Whey protein frequently outscores all
others though red meat often comes second in these matters. The one
protein that scored badly was soy. I'm not sure of the significance
of this research yet.

I'm putting the tidbit out there hoping to capture the interest of
others who might well want to follow it up.

Best wishes,
Quentin.


On Wed, 11 Jun 2008 23:06:16 -0600, Oleg Lego <> wrote:


This is from the CTV web site, at:
http://www.ctv.ca/servlet/ArticleNews/story/CTVNews/20080514/diet_study_080514/20080514?hub=Health

or

http://tinyurl.com/5outq2

---- begin ----

High-protein diet helps keep weight off: study

Updated Wed. May. 14 2008 5:41 PM ET

CTV.ca News Staff

A high-protein diet may be better for keeping weight off once it's
been lost, according to early results from a European study.

In these preliminary findings, researchers compared high and low
protein diets with those based on the glycemic index (GI).

High protein diets include lots of meat, fish, eggs, beans and
lentils.

High-GI foods are carbohydrates, such as potatoes or white bread, that
are digested quickly, leading to a rapid release of glucose (sugar)
into the bloodstream. Low-GI foods, such as many raw fruits and
vegetables, are digested slowly and allow for a more gradual release
of glucose.

Low-GI diets are supposed to help with weight control by making people
feel fuller for longer and by reducing cravings for sweets. They also
help diabetics control blood sugar.

In the study, more than 200 adults first completed a weight-loss
program that required them to lose at least 8 per cent of their body
weight. They were then assigned to follow one of five diets for six
months:

* Diet 1: low protein, low GI = 12 per cent of energy from
protein, 55 to 60 per cent of energy from low-GI carbohydrates.
* Diet 2: low protein, high GI = 12 per cent of energy from
protein, 55 to 60 per cent of energy from high-GI carbohydrates.
* Diet 3: high protein, low GI = 25 per cent of energy from
protein, 45 to 50 per cent of energy from low-GI carbohydrates.
* Diet 4: high protein, high GI = 25 per cent of energy from
protein, 45 to 50 per cent of energy from high-GI carbohydrates.
* Diet 5: control diet = balanced diet based on general dietary
guidelines.

After six months, the researchers found that subjects on Diets 1, 2
and 5 re-gained an average of four to six pounds, while subjects on
diets three and four only regained an average of less then two pounds.

While the study subjects were not specifically on any of today's
popular diets, the findings seem to indicate that the high-protein
Atkins or Zone diets are better for weight loss than newer, trendier
options such as the GI or South Beach diets.

The results were presented Wednesday by study coordinator Professor
Arne Astrup of the University of Copenhagen at a Pre-Congress of
Obesity Satellite Symposium in Geneva, Switzerland.

The study, known as Diogenes, is designed to analyze which diets are
best for weight control. It is also investigating how a high-protein
diet influences weight loss and how genetics may make some diets
better for some and not for others.

The final results will be presented next spring.

"I think the message is following diets with low glycemic index might
be good for type 2 diabetics who are concerned and need some control
of their blood sugar and it might have a slight effect on the bad LDL
cholesterol," Astrup told CTV.

"But in terms of weight loss and weight regulation, the glycemic index
does not play any role, so there is no reason really to waste efforts
and money on that for body weight regulation."

Dr. Yoni Freedhoff of the Bariatric Medical Institute said that
because protein in fact makes people feel full for longer, it makes
sense that it would be easier to lose weight by following a
high-protein diet.

"We certainly recommend that people have protein with every single
meal or snack to minimize hunger, and to eat every two to three
hours," Dr. Freedhoff said.

"It's important to not be hungry to be in control."

Ottawa resident Cynthia Rose learned to successfully keep off the 30
pounds she had lost by eating three meals and three snacks a day, and
having some protein every time.

"I wasn't having protein for breakfast, and this made a big
difference. Once I incorporated a handful of almonds at coffee time at
10, and made sure I had protein at breakfast, it really helped," said
Rose.

With a report by CTV's medical correspondent Avis Favaro and producer
Elizabeth St. Philip.

Abstract:

Weight loss maintenance on ad libitum diets varying in protein content
and glycemic index: first results of the DIOGENES highly-controlled
shop-based intervention.

van Baak, MA, Larsen, TM, Jebb, SA, Kafatos, A, Pfeiffer, A, Martinez,
JA, Handjiev, S, Kunesova, M8, Astrup, A, Saris, WHM

AIM To study the effects of protein content and glycemic index (GI) of
the diet on weight loss maintenance during a 6-month highly controlled
shop-based dietary intervention in 2 centers.

DESIGN After an 8 week low calorie diet (body weight (BW) loss 11±3%),
263 adults (106 men, 157 women; BW 99.8±15.6 kg, BMI 33.5±4.3 kg/m2,
age 42±6 y) were randomized to 5 ad libitum diets for 6 months: high
protein/low GI (HP/LGI), HP/high GI (HP/HGI), low protein/high GI
(LP/HGI), LP/low GI (LP/LGI) and control diet. Aim was a difference in
protein intake of >10 energy% and in GI of >10 units. Foods were
provided for free and registered through a shop system.

RESULTS 205 subjects (=78%) completed the 6-month intervention. Their
BW increased 1.5±4.6 kg or 16.0±40.9% of initial weight loss
(P<0.001). Weight regain across diets (in kg and as % of initial
weight loss) was 2.1±3.9 and 19±35 (LP/LGI), 2.8±3.5 and 26±37
(LP/HGI), 0.8±4.3 and 8±39 (HP/LGI), 0.3±6.4 and 7±52 (HP/HGI), and
1.9±4.3 and 22±37 (control). Factorial ANOVA with BMI, gender and
initial weight loss as covariates showed a significant main effect of
protein content (P = 0.006 resp. 0.009), but no main effect of GI or
interaction between protein and GI.

CONCLUSION A higher protein content of the diet improved weight loss
maintenance, GI did not modify this effect. Funded by the EU contract
nr: Food 2005-CT-513946
--
Quentin Grady ^ ^ /
New Zealand, >#,#< [
/ \ /\
"... and the blind dog was leading."

http://homepages.paradise.net.nz/quentin
.

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