Jak na razie, to chyba Ty szukasz audytorium do wygadania się na tym forum. Piszesz to samo w 2 postach, w każdej wypowiedzi powtarzasz to samo, obrażasz innych, użalasz się nad sobą i nic z tego nie wynika. Kłócisz się o rzeczy, w których właściwie się zgadzamy. Szukasz problemu tam, gdzie go nie ma. Po co to wszystko? Po co tyle zamieszania? Przyszedłeś ratowac świat? Na tym forum pewnie 90% osób spożywa 1,2-2,2
g/kg, a nie więcej (względy finansowe, wygoda).
na koniec opracowanie doktora Berardiego
ISSUE #1 — Many physicians believe that high protein diets cause kidney dysfunction
RESPONSE #1 — This is FALSE according to everything science now knows to be true. This presumption states that if you take a healthy person and put them on a high protein diet, the protein will somehow negatively influence the kidney, damaging it and causing renal disease.
To this end, there is absolutely no data in healthy adults suggesting that a high protein intake causes the onset of renal (kidney) dysfunction. There aren’t even any correlational studies showing this effect in healthy people.
Any studies that show a correlation between renal (kidney) dysfunction and protein intake are in those with some type of diagnosed, pre-existing renal (kidney) disease like diabetic nephropathy, glomerular lesions, etc. Even research into protein restriction for renal patients can be controversial. (Shils, Modern Nutr in Health & Dis, 1999).
Besides, you’ll likely recognize a serious pre-existing kidney condition; the signs and symptoms will clue you in long before you happen upon it with a routine blood test (especially if there's a noted family history of diabetes mellitus and hypertension).
Since an exhaustive search of the published literature will likely not yield a single study showing that the amount of protein in the diet causes, or is correlated with, the onset of renal dysfunction in otherwise healthy individuals, the fact that this notion prevails is puzzling to say the least!
But even if a doctor were to find an obscure reference that might suggest a relationship between a high-protein diet and kidney disease, there are numerous studies showing otherwise. Here are a few of them:
a) Ann Intern Med 2003 Mar 18;138(6):460-7
The impact of protein intake on renal function decline in women with normal renal function or mild renal insufficiency.
Knight EL, Stampfer MJ, Hankinson SE, Spiegelman D, Curhan GC.
b) Int J Sport Nutr Exerc Metab 2000 Mar;10(1):28-38
Do regular high protein diets have potential health risks on kidney function in athletes?
Poortmans JR, Dellalieux O.
c) Int J Obes Relat Metab Disord 1999 Nov;23(11):1170-7
Changes in renal function during weight loss induced by high vs low-protein low-fat diets in overweight subjects.
Skov AR, Toubro S, Bulow J, Krabbe K, Parving HH, Astrup A.
d) Eur J Clin Nutr 1996 Nov;50(11):734-40
Effect of chronic dietary protein intake on the renal function in healthy subjects.
Brandle E, Sieberth HG, Hautmann RE.
e) Am J Kidney Dis 2003 Mar;41(3):580-7
Association of dietary protein intake and microalbuminuria in healthy adults: Third National Health and Nutrition Examination Survey. "Dietary protein intake was not associated with microalbuminuria in normotensive or nondiabetic persons."
If you’re interested, these studies can be accessed at
www.pubmed.com.
ISSUE #2 — Many physicians believe that because high protein diets can worsen the condition of those who already suffer from kidney dysfunction, it only stands to reason that this should be true in healthy people.
RESPONSE #2 — This is also FALSE!
Much of the speculation about kidney dysfunction associated with high protein diets comes from early nutritional studies in renal patients (patients who already have kidney disease).
In these individuals, when high protein diets are given as part of total parenteral nutrition—or tube feedings—these diets exacerbated their renal (kidney) problems. From these data, some physicians and nutritionists began to speculate (sometimes erroneously) that increased protein in the diet could be harmful to even those with healthy kidneys.
While there are hundreds of studies showing that high protein diets are bad for kidney patients, I believe that a "leap" from clinical patients to healthy patients isn't warranted. It’s this leap that has been the cause of the persistent but slowly dying (sorry for the word selection) idea that high protein diets could harm the kidneys.
Again, there's no evidence whatsoever that high protein diets will harm the kidneys of a healthy weightlifter. This is about as ridiculous as someone suggesting that because eating certain types of fiber can worsen the GI symptoms of someone with irritable bowel syndrome, fiber must cause irritable bowl syndrome in otherwise healthy people.
ISSUE #3 — Kidneys DO change to adapt to high protein diets.
RESPONSE #3 — Some studies in healthy individuals do show an alteration of kidney function with very high protein diets. However, it's important to note that these changes are not reported as negative or "adverse." Instead, they seem to be structural adaptations to increased filtration (something the kidneys are doing all the time anyway).
If the kidney didn’t respond this way, most clinicians would think something was wrong. Just like in weight training, tissues adapt to the demands put on them. Therefore, just because the kidneys have to "work" harder, doesn’t mean that this is a negative thing. After all, what happens when muscles work harder? Well, they adapt to the demands and become bigger, stronger, or more efficient. Therefore, the adaptation that kidneys undergo is reasonable and appropriate. But don’t take my word for it, check out this study (again at
www.pubmed.com):
Eur J Clin Nutr 1996 Nov;50(11):734-40
Effect of chronic dietary protein intake on the renal function in healthy subjects.
Brandle E, Sieberth HG, Hautmann RE.
Zmieniony przez - junior__23 w dniu 2007-08-14 12:07:10
espaniole
junior__23
