Posiłki na diecie TKD

Dlatego nie przejmuję się zbytnio stopą konwersji białka do glukozy, dopóki podstawowym źródłem energii jest tłuszcz

NIE BARDZO ROZUMIEM WSZEDZIE CZYTALEM ZE KONWERSJA BIALKA DO GLUKOZY JEST STALA I JEST SPOSOBEM W JAKI ORGANIZM TRAWI BIALKA (NIEZALEZANIE OD OKOLICZNOSCI)???
NO CHYBA ZE COS PRZEOCZYLEM JESLI TAK PROSZE O KOREKTE

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'Alternatywna Droga'

Zmieniony przez - biniu w dniu 2003-04-14 09:22:39

What limits the liver's capacity to convert amino acids to glucose?

Conversion of amino acids to glucose involves several metabolic processes; deamination or transamination, conversion of the released NH4 + to urea and finally synthesis of glucose from amino acid residues. The key to understanding the physiological limitation of glucose formation from amino acids lies in the large amount of energy required to fuel these processes. Energy in the sense used here means the hydrolysis of adenosinetriphosphate (ATP) to either AMP + PPi or ADP + Pi. Four ATP molecules are used to convert two NH4+ to urea and six more are required to convert the carbon skeletons of these amino acids to glucose. One ATP is also required to add a glucosyl group to a glycogen molecule so, you see, a lot of energy is used in this process. All cells and tissues are built up such that ATP levels are relatively stable. This is a basic prerequisite for life. Under gluconeogenesis the liver must rely upon aerobic metabolism to replace the ATP that is consumed. By definition this is an oxygen-dependent process. The "catch" is that the liver obtains most of its oxygen from the portal vein where the partial pressure of oxygen is rather low. This limits uptake of oxygen, limits ATP production and synthesis of glucose from amino acids.

We have data about the total extent of the oxygen supplied to the human liver. Calculations based on this (and assuming the all of this oxygen goes to support conversion of amino acids to glucose) suggest that the maximum capacity of hepatic glucose synthesis from amino acids lies around 400 grams/day. This is the equivalent of approximately 1600 kcal, close to the basal metabolism of a bed-ridden person and hardly enough to support an active life.

Now we can explain the weight-reducing effects of low-carbohydrate high protein diets. Proteins and the amino acids derived from these are "burned" as glucose. Conversion to glucose is mandatory if the energy in these is to be utilized. Consumption of more protein than can be converted to glucose simply results in loss of these as amino acids in urine.

If the carbohydrate content of the diet is low, amino acids can and do supply the glucose necessary to hold a stable blood sugar level and brain activity. In starvation, the body uses its own proteins. With a high protein diet these come from food.

What about energy necessary for a normal active life when one consumes a high-protein diet? This has to come from fat, either from the body (weight-loss) or the diet (pemmican and other high-protein high-fat diets). Vilhjalmur Stefansson, Fridtjof Nansen og Helge Ingstad have all written about the intense "hunger for fat" that they and their associates experienced while living and working in Artic areas. Their diets were largely meat-based and fat was an extremely important energy source for them.

Ciekawostką, która stąd wynika, jest min. 400g białka/dzień, żeby ograniczyć katabolizm mięśni

pytanie czy zalezy nam na zastopowaniu katabolizmu w zupelnosci ??
w moim odczuciu nie nalezy do tego dazyc, bez katabolizmu nie ma anabolizmu
zresztza nie jestem pewien czy masz racje z tym watkiem co do hamowania zupelnego katabolizmu, nie jestem pewnen czy organizm nie jest sprytniejszy od badan, ale sadze ze to juz temat dla I... zapraszam do ew dyskusji

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'Alternatywna Droga'

Teraz akurat chodziło mi o to, że na tzw. głodówkach białkowych w znacznym stopniu traci się i tłuszcz, i mięśnie, co jest potwierdzone badaniami. Dlatego zawsze zniechęcałem do tego typu diet poza sytuacjami krańcowymi. A tu wychodzi na to, że wystarczy odp. dużo białka 400g to przecież norma dla 160kg jegomościa no i do tego tzeba garść pankreatyny i trilacu

głodówkach białkowych w znacznym stopniu traci się i tłuszcz, i mięśnie, co jest potwierdzone badaniami. Dlatego zawsze zniechęcałem do tego typu diet poza sytuacjami krańcowymi.

JAK KAZDA DIETA GLODOWKOWA ,
RESZTE JUZ CHWYTAM

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'Alternatywna Droga'