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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) |
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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. |
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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) |
#4
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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) |
#5
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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 |
#6
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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. |
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