A protein in urine test determines how much protein is present in our urine.
In most cases, our urine contains very little protein. Proteinuria, or a high level of protein in the urine, could indicate kidney disease. Kidneys are organs that filter excess water and waste from our blood to produce urine.
Proteins are big molecules that our body requires to function properly. Protein can be present throughout our body, including in our blood.
Tiny filters prevent big protein molecules from leaving our body through urine as our kidneys clear waste from our blood.
Protein can flow into our urine if our kidneys are malfunctioning. High protein levels in our urine over time may be the first indicator that kidney disease or another ailment has damaged our kidney filters.