Healthy kidneys keep most protein in the blood, so only tiny amounts normally appear in urine. Elevated urine protein (proteinuria) is an important early sign of kidney damage, since damaged filters leak protein that should be retained. It can also rise temporarily with fever, intense exercise, dehydration, or standing for long periods. Because protein in the urine is one of the earliest markers of kidney disease, especially in people with diabetes or high blood pressure, a persistent result is followed up with more specific kidney testing.
Urine Protein isn't sold on its own. It comes in a routine urinalysis, about $45. A fuller workup adds Vitamin D ($75), hs-CRP ($69), ApoB ($50), and ApoA1 ($50). You can test Urine Protein and 100 other biomarkers for $190 as part of an Empirical membership.
Empirical is FSA/HSA eligible, so you can pay with pre-tax dollars. Fast for 8-12 hours beforehand for the most accurate lipid and metabolic results, and expect results in days rather than weeks.
Urine Protein is drawn at 2,200+ Quest and BioReference patient service centers across the US, so there's usually one within a short drive. Browse the full directory to find the one closest to you.
Test your Urine Protein and 100+ other biomarkers in a single blood draw.