You need to talk to your doctor about why you have protein in your urine and what it indicates for you before you do anything.
Basically the kidneys act as a filter or a sieve and bigger molecules like protein shouldn't normally get though. If they are leaking protein it can be temporary as in an infection, it can sometimes happen when you have been very active . Sometimes people find that on a repeat test the sample is clear.
We can also get protein in the urine if the kidney isn't able to filter the blood efficiently.
http://www.nhs.uk/Livewell/Kidneyhealth/Documents/protein in urine.pdf
Normally doctors will do both a test for protein and a blood test that enables them to estimate your filtration rate. It's those two tests together that indicate whether you have got reduced kidney function. This last test is also part of the normal tests that people with diabetes have each year.
http://www.labtestsonline.org.uk/understanding/analytes/gfr
If you have been told that that you have reduced kidney function then the Edinburgh renal unit says this about protein.
"In the past a low protein diet was often recommended to slow down the steady deterioration of kidney function that occurs in some patients. We don't advise this any more, instead recommending a controlled protein diet (
not low, not high; 0.8-1g protein per kg of ideal body weight, if you like measuring"
(the WHO RDA is .83g per kg so this is actually what all of us should be eating, many of us do tend to eat too much.)
The US DAVITA site says much the same
If you are in stages 1, 2, or 3 of CKD," your protein intake may be limited to 12-15% of your calorie intake each day.
This is the same level recommended by the Dietary Reference Intakes (DRIs) for a healthy diet for normal adults. It may seem like a restriction because the average American eats a high protein diet."
