Kohlenhydrate

[rantanplan]

inweifern sollte der gi irgendeine rolle spielen? es geht um komplex oder nicht... der gi ist meiner meinung nach nur für leute mit diabetis relevant

Gerade weil die Komplexität eines Kohlehydrates praktisch ohne jede Aussagekraft ist, wurde ja das GI-Konzept entwickelt!

Außerdem es wird versucht die eigene Testo Produktion überall auf hochtouren zu bringen.... während Insulin ein doch mindestens genauso wichtiges Hormon ist!?

Durch niedrig-glykämische Carbs hast Du einen "ausbalancierteren" Stoffwechsel - das ist in der Regel günstig und kann sich auch positiv auf die N-Bilanz auswirken.

J Nutr. 1996 Sep;126(9):2120-9.

Dietary starch composition and level of energy intake alter nutrient oxidation in "carbohydrate-sensitive" men.

Howe JC, Rumpler WV, Behall KM.

Energy and Protein Nutrition Laboratory and Carbohydrate Nutrition Laboratory, Beltsville Human Nutrition Research Center, U.S. Department of Agriculture, MD 20705, USA.

The effect of dietary starch type on components of 24-h energy expenditure (total, sleep, exercise) were examined in 13 hyperinsulinemic and nine control men, aged 28-58 y. Subjects consumed products containing 70% amylopectin or 70% amylose cornstarch for two 14-wk periods in a crossover design. A 10-wk period of starch replacement in the subjects' self-selected diets was followed by a 4-wk controlled feeding period at 100% maintenance energy intake; diets during the last 4 d of the controlled feeding period provided excess energy, i.e., 125% of maintenance energy. Data for insulin, glucose, 24-h energy expenditure and its components, respiratory quotient and nutrient oxidation were analyzed by ANOVA for mixed models. Although insulin and glucose responses to a starch tolerance test remained greater for hyperinsulinemic than for control subjects, both were reduced with high amylose consumption (P < 0.04). No component of energy expenditure was significantly affected by dietary starch or subject type. However, excess energy intake did increase metabolic energy expenditure (P < 0.0001). Protein oxidation increased with excess energy intake when subjects consumed the high amylopectin starch but did not increase in response to excess energy consumption when the high amylose diet was consumed, suggesting increased protein retention. The magnitude of the response in carbohydrate and fat oxidation was blunted in hyperinsulinemic subjects consuming excess levels of the amylose diet. This may be due to an improvement in overall insulin response or to a change in available substrates for oxidation resulting from microbial fermentation.

Diabetes Care. 2002 May;25(5):822-8.

Five-week, low-glycemic index diet decreases total fat mass and improves plasma lipid profile in moderately overweight nondiabetic men.

Bouche C, Rizkalla SW, Luo J, Vidal H, Veronese A, Pacher N, Fouquet C, Lang V, Slama G.
Institut National de la Sante et de la Recherche Medicale (INSERM) Unit 341, Department of Diabetes, AP Hotel-Dieu Hospital, Paris, France.

OBJECTIVE: To evaluate whether a 5-week low-glycemic index (LGI) diet versus a high-glycemic index (HGI) diet can modify glucose and lipid metabolism as well as total fat mass in nondiabetic men. RESEARCH DESIGN AND METHODS: In this study, 11 healthy men were randomly allocated to 5 weeks of an LGI or HGI diet separated by a 5-week washout interval in a crossover design. RESULTS: The LGI diet resulted in lower postprandial plasma glucose and insulin profiles and areas under the curve (AUCs) than the HGI diet. A 5-week period of the LGI diet lowered plasma triacylglycerol excursion after lunch (AUC, P < 0.05 LGI vs. HGI). These modifications were associated with a decrease in the total fat mass by approximately 700 g (P < 0.05) and a tendency to increase lean body mass (P < 0.07) without any change in body weight. This decrease in fat mass was accompanied by a decrease in leptin, lipoprotein lipase, and hormone-sensitive lipase RNAm quantities in the subcutaneous abdominal adipose tissue (P < 0.05). CONCLUSIONS: We concluded that 5 weeks of an LGI diet ameliorates some plasma lipid parameters, decreases total fat mass, and tends to increase lean body mass without changing body weight. These changes were accompanied by a decrease in the expression of some genes implicated in lipid metabolism. Such a diet could be of benefit to healthy, slightly overweight subjects and might play a role in the prevention of metabolic diseases and their cardiovascular complications.