[milanche (OP)]

Hello everyone. I have one question. I have trouble with overweight. I went to some nutritionist who claims that have some very good diet. It is based on proteins. Something similar (but not the same), as Atkinson's diet etc. In the beginning he would giving me some amino acids as supplement. Since I know too many proteins could cause some kidney diseases, I asked if his diet is safe in this way and he said that too many proteins could be harmful for kidneys, but if I took it like amino acids, then it is safe. He said that problem with proteins and kidneys is that kidneys should decompose proteins to amino acids, and that process could cause that problem, but when body, and kidneys got amino acids then kidneys doesn't have that problem.

So I would like someone who knows physiology and biochemistry good, to tell me if this is true and if possible to explain in short why is that so? Thanks.

[exothermic]

lol.... I would not take any more advice from the "nutritionist" in question.
 
A high-protein diet will absolutely NOT cause kidney disease and/or renal failure. The kidneys don't even filter protein. The kidneys filter amino acids.

[carolsanders]

Dietary supplements never harms kidney. If still worried about it that you can also take advice from dietitian. 

[chris]

Dietary supplements never harms kidney. If still worried about it that you can also take advice from dietitian. 

Never say never in medicine. "Safe" supplements may do no harm, but some supplements may be contaminated, or just untested, and have harmful health side effects.

To address the original question being asked, dietary proteins will not affect a healthy kidney.

However, a person with renal failure owing to kidney disease can have serious problems with dietary protein. This is because the kidney provides the normal route out of the body for disposal of nitrogenous waste. This comes from breaking down or "deaminating" the amino acids in proteins, and most of it is lost as urea in the urine.

Renal failure can lead to an accumulation of nitrogen compounds, which can have a range of health impacts. Patients with renal disease therefore have to be careful about their dietary protein burden.

This should not be confused with the proteinuria (protein in the urine) detected under certain conditions. Damage to the kidney, such as chronic hypertension (high blood pressure) or diabetes, can affect the ability of the kidney to selectively repel the proteins in blood; this results in some of the proteins being filtered into the urine, where they are detectable with a dip-stick test.

In this instance, however, the proteins are a consequence rather than a cause of kidney disease.