problems caused by protein excess

alpha

New Member
I got this from an article. I've posted the link below. :
Protein Excess
What sorts of problems can longterm excess consumption of protein lead to? Doctors like McDougall point out that excess protein in diet can contribute (not cause) to osteoporosis, for example.

Diets high in protein are often also high in purines -- this can lead to gouty arthritis.

Diets high in the sulpher containing amino acids might put people at greater risk for cardiovascular disease.

Diets high in protein stress the kidneys, because the kidneys have to get rid of the protein breakdown by-products, which can be very toxic if left to accumulate.
from: http://timinvermont.com/vegprotn.htm

how much protein is enough to promote muscle growth but no so much as to cause these problems?
 
Dont worry about osteoporosis, as low protein diets are worse for the bones in general (bones are formed from protein plus minerals)., If you are on a low dairy consumption it could be worse.

Heart disease is more to do with the whole diet rrather than the amino acids per se

For a natural, you only need ~1g/lb to grow, can vary up and down but its within that region.
 
Diets high in protein stress the kidneys, because the kidneys have to get rid of the protein breakdown by-products, which can be very toxic if left to accumulate.

How about this one. I've heard it pretty often.
 
[b said:
Quote[/b] (alpha @ Sep. 15 2003,11:51)]Diets high in protein stress the kidneys, because the kidneys have to get rid of the protein breakdown by-products, which can be very toxic if left to accumulate.
How about this one.
False. I am sure someone can give a better explanation but the study was done in the 50's with renal failure patients who "couldn't get rid of the protein". That is like asking a cardiomyopathy patient to run sprints and deducing that exercise is bad for you. NO study has ever proven that excess protein is "bad" for the kidneys in a healthy individual.
 
[b said:
Quote[/b] (alpha @ Sep. 15 2003,11:51)]Diets high in protein stress the kidneys, because the kidneys have to get rid of the protein breakdown by-products, which can be very toxic if left to accumulate.
How about this one.
You do "hear" alot but most of the information out there is worthless. False. I am sure someone can give a better explanation but the study was done in the 50's with renal failure patients who "couldn't get rid of the protein". That is like asking a cardiomyopathy patient to run sprints go into heart failure and deduce that exercise is bad for you. NO study has ever proven that excess protein is "bad" for the kidneys in a healthy individual.
 
Dont worry about toxic overload, take a look at most bbrs for the past 40 years, they have had a high protien diet. Even with their massive drug intakes they aint all dieing from kidney disease :)

The kidney adapts to the higher workload (altho drinking more water is a good idea), but people whos kidneys are diseased cannot adapt, so they can have problems.
Newer research on the subject is more interesting than the old 'high protien = dead kidneys' :)
Also the NAS recomemndations on protein intake allow up to ~3-4g/kg or ~40% total energy from protien as safe, becuase there is no evidence other wise (they cant really say about higher, because there is no research on it.)
 
thanx for the responses
worship.gif
 
basically a large percentage of the protien (~50-60% usually nonessential aminos) is deaminated and the excess amine has to be extreted. So your not wizzing out proten per se, just part of it.
Now, what happens to the remainder of the chain is more complicated. If it is converted to glucose (which seems unlikely in the face of adequate glycogen supply) then it isnt really released into circulation very much. Or theoretically it could also be stuck straight into the citrix acid cycle as an intermetdiate and used for energy. It could also potentially be converted to fat, but probably not to any significant extent.
 
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