Albuminuria is the presence of a particular protein in urine called Albumin, which in high concentrations can indicate serious urinary tract problems, especially with the kidneys and how they filter waste and useful substances. If there is just a slightly higher amount of Albumin in urine than normal, that is called Microalbuminuria and whenever there is a high level of protein in the urine, the condition is referred to as Macroalbuminuria.
Healthy kidneys allow the blood to pass through them, and to carry the proteins through the kidneys and have them remain in the blood. Damaged kidneys allow the proteins to pass through them and that creates a lack of protein in blood and a concentration of protein in the urine. Albuminuria can be a symptom of Chronic Kidney Disease (CKD) or complete kidney failure.
Detecting Albuminuria that is consistent over a week or two can also be a sign of diabetic kidney disease. Additional causes of having too much Albumin in pee can be high blood pressure, or heart problems that lead to heart failure, various metabolic problems, or kidney damage.
A urine dipstick test can detect albumin and other proteins in the urine. The dipstick test provides an accurate measure of whether there is protein in urine. The dipstick test is not accurate in determining protein concentration levels, so it is a yes or a no type of test. There are many urine tests that a doctor may want to perform. PCR or ACR tests (protein creatinine to albumin creatinine ratio). Ketone Urine Tests are also appropriate.
While the over the counter test can detect presence of a large number of chemicals in your pee, most people are not educated enough in medicine or qualified to diagnose what the root problem really is.