While it remains controversial about "high protein" and what exactly IS
high protein.... many people find protein cuts appetite considerably...
Here is a new article on why:
Quote:
Week of Sept. 9, 2006; Vol. 170, No. 11 , p. 173
High-protein diets boost hunger-taming hormone
Christen Brownlee
Eating protein appears to boost blood concentrations of a hormone recently found to restrict appetite, researchers report. The findings could explain the success of popular high-protein diets.
Four years ago, Rachel L. Batterham of University College London and her colleagues found that injecting a hormone called peptide YY (PYY) into both normal-weight and obese people reduced their food intake by about a third and dampened hunger. A person's gut normally secretes the hormone during and after a meal.
Batterham's team wondered whether food's three basic nutrients—protein, carbohydrates, and fat—have different effects on how much PYY people secrete.
To find out, the researchers recruited groups of normal-weight and obese men. Each volunteer came into Batterham's lab and ate a specially crafted meal on three days. Although the three meals tasted similar and had the same number of calories, each meal offered a different proportion of calories from protein, carbohydrates, and fat.
The researchers found that blood concentrations of PYY were significantly higher in both groups of men after the high-protein meal than after meals high in carbohydrates or fat. Both groups reported higher sensations of fullness and less hunger after eating more protein.
Working with normal and obese mice, the researchers found that animals fed high-protein diets gained less weight and made more PYY than those fed more carbohydrates or fat. However, animals genetically modified to produce no PYY gained similar amounts of weight, regardless of their diets' composition.
Batterham's team suggests in the September Cell Metabolism that people can harness the appetite-decreasing power of PYY simply by boosting their dietary protein.
If you have a comment on this article that you would like considered for publication in Science News, send it to editors@sciencenews.org. Please include your name and location.
References:
Batterham, R.L., et al. 2006. Critical role for peptide YY in protein-mediated satiation and body-weight regulation. Cell Metabolism 4(September):223-233. Abstract available at http://dx.doi.org/10.1016/j.cmet.2006.08.001. Full text available at http://www.cellmetabolism.org/content/article/fulltext?
uid=PIIS1550413106002713.
Further Readings:
Batterham, R.L., et al. 2003. Inhibition of food intake in obese subjects by peptide YY3-36. New England Journal of Medicine 349(Sept. 4):941-948. Available at http://content.nejm.org/cgi/content/full/349/10/941.
Sources:
Rachel L. Batterham
Department of Medicine
University College London
Rayne Building
5 University Street
London WC1E 6JJ
United Kingdom
From Science News, Vol. 170, No. 11, Sept. 9, 2006, p. 173.
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http://www.sciencenews.org/articles/20060909/note13.asp
I have found that about 30% of daily calories from protein works for me.
Really high levels, should be supervised by your doctor, and you should
have kidney functions and liver enzymes run periodically, as the kidneys and liver work harder as you increase protein levels.
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All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
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Weezie looking at petunias 8.25.2017
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