Protein is a superstar of sorts in the Nutrient Circles, be it in sickness or in health. But do you completely understand all that you must, when it comes to this “celebrated nutrient” in the context of Chronic Kidney Disease (CKD)?
The leakage of Plasma Protein in urine is technically termed as “Proteinuria” (pronounced as pro-teen-you-reah). These proteins are NOT the usual nutrient that you obtain from food. These are a different class of Proteins specially made by your Liver.
Plasma Proteins normally circulate in your bloodstream & help with a range of functions essential to keep you alive. Urine samples with Protein tend to be visibly foamy / frothy akin to the kind that you get after dissolving detergents in water. The extent of foam will certainly vary with the extent of protein leakage.
Normally, Urine produced by healthy kidneys is a cocktail of toxic waste products of cellular metabolism, a host of minerals, salts, smelly organic compounds & excess water. (Find the complete normal urine composition here). These components begin to get together to form Urine once healthy kidney micro-filters “strain” our blood through themselves. These micro-filters are uber-selective with what they “let-out” into the urine. This is such that, all blood cells & “plasma” proteins remain in the bloodstream while the wastes & excesses purge themselves out.
But what makes these Kidney Micro-filters that selective against leakage of blood cells & protein in urine?
In good health, how yellow your urine appears directly relates to your water/liquid intake. The more dehydrated you are, the denser & more concentrated your urine is, and the darker is the yellow colour as depicted in the image below.
Samples in the image above aptly show the normal variation in Urine Colour in good health. For all practical diagnostic purposes, this urine colour range qualifies as normal. Now, Urine is not a topic that would usually make the cut in any polite conversation in non-specialist social gatherings.