What is the normal protein level in urine?

What is the normal protein level in urine?

• A. 100 mg/dL
• B. 50 mg/dL
• C. Zero mg/dL
• D. Less than 20 mg/dL

Answer: (D)

Normal urine protein reflects how well the kidneys prevent loss of protein into the urine. In a healthy person, the glomerular filter and the tubules keep most protein out, so only trace amounts reach the urine. A random urine sample that is within normal limits typically shows less than about 20 milligrams of protein per deciliter of urine. Values below this threshold are considered normal, while higher levels indicate proteinuria, which can point to kidney problems or other conditions. Keep in mind that a single concentration measurement can vary with how concentrated the urine is, so clinicians also consider daily protein excretion (usually under 150 mg per day) or an albumin-to-creatinine ratio for a more accurate assessment.

Normal urine protein reflects how well the kidneys prevent loss of protein into the urine. In a healthy person, the glomerular filter and the tubules keep most protein out, so only trace amounts reach the urine. A random urine sample that is within normal limits typically shows less than about 20 milligrams of protein per deciliter of urine. Values below this threshold are considered normal, while higher levels indicate proteinuria, which can point to kidney problems or other conditions. Keep in mind that a single concentration measurement can vary with how concentrated the urine is, so clinicians also consider daily protein excretion (usually under 150 mg per day) or an albumin-to-creatinine ratio for a more accurate assessment.