Now I know we're not rats,although you'd never know it the way mainstream
research uses the rat model. Thought this was interesting
Physiol Behav 2002 May 1;76(1):65 Related Articles, Links
Wistar rats allowed to self-select macronutrients from weaning to maturity
choose a high-protein, high-lipid diet.
Jean C, Fromentin G, Tome D, Larue-Achagiotis C.
Institut National de la Recherche Agronomique, Unite de Physiologie de la
Nutrition et du Comportement Alimentaire, Institut National Agronomique de
Paris-Grignon, 16 rue Claude Bernard F-75005 75231, Paris, France
The aim of this work was to study the evolution of rat food choice in
relation to their age and metabolic parameters. Eighty Wistar rats were
studied from birth to 13 weeks of age. At weaning, six litters were fed on a
macronutrient self-selecting diet and four on a standard diet. In
self-selecting males, protein intake was maximal at Week 7 of age and then
plateaued (Week 13), whereas in females, protein consumption peaked at Week 7
and then steadily decreased. Females showed a strong and early preference for
fat, which increased continuously with age. Males and females ingested their
total energy intake during the dark period (respectively, 79% and 70%).
Simple meals (composed of one item) were mainly ingested during the light
phase, while mixed meals (at least two items) were ingested during the night.
In males, most mixed meals began with carbohydrate bouts and finished with
proteins, while in females no particular choice was observed at the beginning
of meals, but most of them ended with protein bouts. Body weights of either
male and female self-selecting or control fed rats were not significantly
different at the end of the experiment. Differences between dietary groups in
body fat mass were not observed with the exception of higher subcutaneous fat
found in self-selecting rats. Moreover, insulinemia was lower in both male
and female self-selecting rats. The high-protein, high-fat diet chosen by the
self-selecting rats could be linked to a prevention of the age-related
insulin resistance.
http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_u
ids=12175590&dopt=Abstract
Namaste, Liz
<A HREF="http://www.csun.edu/~ecm59556/Healthycarb/index.html">
http://www.csun.edu/~ecm59556/Healthycarb/index.html</A>
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