Why high-protein meat may curb appetite
 

Why high-protein meat may curb appetite
Brief abstract:
Although levels of fats and sugars have been shown to influence the
desire to eat, until now no team had demonstrated how protein molecules
regulate appetite, the researchers claim. Using rats, researchers looked
at the mTOR enzyme and investigated body response by injections of the
amino acid leucine - found in high protein meats and grains. The leucene
treated animals subsequently ate less and gained less weight. This
appears to substantiate the hypothesis that proteins can curb appetite.

Good news for Atkins? Maybe.


------------------------------------------------------------------------


Why high-protein meat may curb appetite

* 19:00 11 May 2006
* NewScientist.com news service
* Roxanne Khamsi
http://www.newscientist.com/article/...-appetite.html


A new appetite-controlling pathway that responds to molecules found in
meat has been discovered in the brain. This brain signal system is
triggered by specific amino acids and may lead to new ways of helping
obese people lose weight, researchers say.

Certain amino acid molecules – the building blocks of proteins – exert
powerful control over appetite, according to a new study in rats.
Animals given injections of the amino acid leucine, which is found in
high-protein meats and grains, gained only about one-third of the weight
put on by their control counterparts.

Although levels of fats and sugars have been shown to influence the
desire to eat, until now no team had demonstrated how protein molecules
regulate appetite, the researchers claim.

Randy Seeley at the University of Cincinnati in Ohio, US, and his
colleagues looked at an enzyme called mTOR, which responds to protein
molecules and regulates their synthesis within cells. They found that
mTOR was highly active in a region of the rat brain called the
hypothalamus – a structure that is involved in regulating appetite in
both humans and rats.

To see whether the mTOR pathway in the hypothalamus responds to amino
acids, Seeley injected 1 microgram of leucine directly into the brains
of rodents, near the hypothalamus. Over the next day, the rats that
received the injection consumed 25 grams of food on average while the
control rats consumed 30 g of food.
Fooled brains

A brief fasting period produced more dramatic results. When the growing
rats were offered food after a 24-hour fasting period, the ones that had
received the leucine brain injections gained just 4 g of weight in a
day. The injection-free controls put on 12 g – three times as much.

Seeley believes the high levels of leucine in the hypothalamus of
injected rats fooled their brains into believing that they had an ample
supply of protein molecules circulating as available fuel in the body.
This tricked their brains into suppressing hunger, he explains.

However, Seeley cautions that the findings do not necessarily explain
why some people claim lose weight on the controversial high-protein
Atkins diet. It remains unclear if ingested leucine has the same effect
as leucine injected directly into the brain, he notes.

Journal reference: Science (DOI: 10.1126/science.1124147)

--
1) Eat Till SATISFIED, Not STUFFED... Atkins repeated 9 times in the book
2) Exercise: It's Non-Negotiable..... Chapter 22 title, Atkins book
3) Don't Diet Without Supplemental Nutrients... Chapter 23 title, Atkins
book
4) A sensible eating plan, and follow it. (Atkins, Self Made or Other)

Why high-protein meat may curb appetite
 

Marengo wrote:
:: On Fri, 12 May 2006 09:20:10 -0500, Jbuch wrote:
::
::: Why high-protein meat may curb appetite
::
:: Is that as opposed to low-protein meat?

:)

I took that to mean perhaps chicken breast as opposed to a fatty cut of
steak.

Why high-protein meat may curb appetite
 

I just recently read somewhere that peanuts were a good source of
protein and healthy fats along with the fact that peanuts actually curb
hunger and delay emptying of the stomach thus the satisfaction and full
feelings remain a little longer. While I knew about the protein and
fats I didnt know they left your stomach slower than other things.
Laureen





Jbuch wrote:
Why high-protein meat may curb appetite
Brief abstract:
Although levels of fats and sugars have been shown to influence the
desire to eat, until now no team had demonstrated how protein molecules
regulate appetite, the researchers claim. Using rats, researchers looked
at the mTOR enzyme and investigated body response by injections of the
amino acid leucine - found in high protein meats and grains. The leucene
treated animals subsequently ate less and gained less weight. This
appears to substantiate the hypothesis that proteins can curb appetite.

Good news for Atkins? Maybe.


------------------------------------------------------------------------


Why high-protein meat may curb appetite

* 19:00 11 May 2006
* NewScientist.com news service
* Roxanne Khamsi
http://www.newscientist.com/article/...-appetite.html


A new appetite-controlling pathway that responds to molecules found in
meat has been discovered in the brain. This brain signal system is
triggered by specific amino acids and may lead to new ways of helping
obese people lose weight, researchers say.

Certain amino acid molecules - the building blocks of proteins - exert
powerful control over appetite, according to a new study in rats.
Animals given injections of the amino acid leucine, which is found in
high-protein meats and grains, gained only about one-third of the weight
put on by their control counterparts.

Although levels of fats and sugars have been shown to influence the
desire to eat, until now no team had demonstrated how protein molecules
regulate appetite, the researchers claim.

Randy Seeley at the University of Cincinnati in Ohio, US, and his
colleagues looked at an enzyme called mTOR, which responds to protein
molecules and regulates their synthesis within cells. They found that
mTOR was highly active in a region of the rat brain called the
hypothalamus - a structure that is involved in regulating appetite in
both humans and rats.

To see whether the mTOR pathway in the hypothalamus responds to amino
acids, Seeley injected 1 microgram of leucine directly into the brains
of rodents, near the hypothalamus. Over the next day, the rats that
received the injection consumed 25 grams of food on average while the
control rats consumed 30 g of food.
Fooled brains

A brief fasting period produced more dramatic results. When the growing
rats were offered food after a 24-hour fasting period, the ones that had
received the leucine brain injections gained just 4 g of weight in a
day. The injection-free controls put on 12 g - three times as much.

Seeley believes the high levels of leucine in the hypothalamus of
injected rats fooled their brains into believing that they had an ample
supply of protein molecules circulating as available fuel in the body.
This tricked their brains into suppressing hunger, he explains.

However, Seeley cautions that the findings do not necessarily explain
why some people claim lose weight on the controversial high-protein
Atkins diet. It remains unclear if ingested leucine has the same effect
as leucine injected directly into the brain, he notes.

Journal reference: Science (DOI: 10.1126/science.1124147)

--
1) Eat Till SATISFIED, Not STUFFED... Atkins repeated 9 times in the book
2) Exercise: It's Non-Negotiable..... Chapter 22 title, Atkins book
3) Don't Diet Without Supplemental Nutrients... Chapter 23 title, Atkins
book
4) A sensible eating plan, and follow it. (Atkins, Self Made or Other)

Why high-protein meat may curb appetite
 

Thats good to know since I had some for lunch. Hope you had a nice MD
Laureen. Take care.

--
Cheri



Laureen wrote in message
.com...

I just recently read somewhere that peanuts were a good source of
protein and healthy fats along with the fact that peanuts actually curb
hunger and delay emptying of the stomach thus the satisfaction and full
feelings remain a little longer. While I knew about the protein and
fats I didnt know they left your stomach slower than other things.
Laureen





Jbuch wrote:
Why high-protein meat may curb appetite
Brief abstract:
Although levels of fats and sugars have been shown to influence the
desire to eat, until now no team had demonstrated how protein
molecules
regulate appetite, the researchers claim. Using rats, researchers
looked
at the mTOR enzyme and investigated body response by injections of
the
amino acid leucine - found in high protein meats and grains. The
leucene
treated animals subsequently ate less and gained less weight. This
appears to substantiate the hypothesis that proteins can curb
appetite.

Good news for Atkins? Maybe.


---------------------------------------------------------------------
---


Why high-protein meat may curb appetite

* 19:00 11 May 2006
* NewScientist.com news service
* Roxanne Khamsi

http://www.newscientist.com/article/...-meat-may-curb
-appetite.html


A new appetite-controlling pathway that responds to molecules found
in
meat has been discovered in the brain. This brain signal system is
triggered by specific amino acids and may lead to new ways of helping
obese people lose weight, researchers say.

Certain amino acid molecules - the building blocks of proteins -
exert
powerful control over appetite, according to a new study in rats.
Animals given injections of the amino acid leucine, which is found in
high-protein meats and grains, gained only about one-third of the
weight
put on by their control counterparts.

Although levels of fats and sugars have been shown to influence the
desire to eat, until now no team had demonstrated how protein
molecules
regulate appetite, the researchers claim.

Randy Seeley at the University of Cincinnati in Ohio, US, and his
colleagues looked at an enzyme called mTOR, which responds to protein
molecules and regulates their synthesis within cells. They found that
mTOR was highly active in a region of the rat brain called the
hypothalamus - a structure that is involved in regulating appetite in
both humans and rats.

To see whether the mTOR pathway in the hypothalamus responds to amino
acids, Seeley injected 1 microgram of leucine directly into the
brains
of rodents, near the hypothalamus. Over the next day, the rats that
received the injection consumed 25 grams of food on average while the
control rats consumed 30 g of food.
Fooled brains

A brief fasting period produced more dramatic results. When the
growing
rats were offered food after a 24-hour fasting period, the ones that
had
received the leucine brain injections gained just 4 g of weight in a
day. The injection-free controls put on 12 g - three times as much.

Seeley believes the high levels of leucine in the hypothalamus of
injected rats fooled their brains into believing that they had an
ample
supply of protein molecules circulating as available fuel in the
body.
This tricked their brains into suppressing hunger, he explains.

However, Seeley cautions that the findings do not necessarily explain
why some people claim lose weight on the controversial high-protein
Atkins diet. It remains unclear if ingested leucine has the same
effect
as leucine injected directly into the brain, he notes.

Journal reference: Science (DOI: 10.1126/science.1124147)

--
1) Eat Till SATISFIED, Not STUFFED... Atkins repeated 9 times in the
book
2) Exercise: It's Non-Negotiable..... Chapter 22 title, Atkins book
3) Don't Diet Without Supplemental Nutrients... Chapter 23 title,
Atkins
book
4) A sensible eating plan, and follow it. (Atkins, Self Made or
Other)

Why high-protein meat may curb appetite
 

"Laureen" wrote in message
oups.com...
I just recently read somewhere that peanuts were a good source of
protein and healthy fats along with the fact that peanuts actually curb
hunger and delay emptying of the stomach thus the satisfaction and full
feelings remain a little longer. While I knew about the protein and
fats I didnt know they left your stomach slower than other things.

Interestingly enough...since I've started eating LC nearly all of my
physical issues have disappeared, including reflux. But when I eat peanuts,
they cause some of them (reflux being the worst one) to return. Maybe I
have a sensitivity to them...but it's a shame because I sure would love to
have a few now and then :).
--
Sherry
364/290/195
LC since 4/4/05; eating LC but not for weight loss since 4/1/06

Why high-protein meat may curb appetite
 

Roger Zoul wrote:
Marengo wrote:
:: Jbuch wrote:

::: Why high-protein meat may curb appetite

:: Is that as opposed to low-protein meat?

:)

I took that to mean perhaps chicken breast as opposed to a fatty cut of
steak.

I'd love to see a study that compares appetite reduction of fat
and protein. Each subject group gets a different ratio and
the subject group with the best appetite reduction had the
best ratio to use in a diet. I'd bet the answer would be an
average and each person would be different, though.