Which of the following is within the normal range for urine protein?

Which of the following is within the normal range for urine protein?

• A. Less than 20 mg/dL
• B. 50 mg/dL
• C. 100 mg/dL
• D. 200 mg/dL

Answer: (A)

Urine normally contains very little protein because the glomerular filter blocks most proteins from passing into the urine. In a random urine sample, a protein concentration below about 20 mg per deciliter is considered normal. Higher values indicate proteinuria, which can signal kidney damage or other conditions. So, the value that fits normal urine protein is less than 20 mg/dL. (For context, total daily protein excretion should be under about 150 mg per day, and clinicians may use a protein-to-creatinine ratio to account for urine concentration.)

Urine normally contains very little protein because the glomerular filter blocks most proteins from passing into the urine. In a random urine sample, a protein concentration below about 20 mg per deciliter is considered normal. Higher values indicate proteinuria, which can signal kidney damage or other conditions. So, the value that fits normal urine protein is less than 20 mg/dL. (For context, total daily protein excretion should be under about 150 mg per day, and clinicians may use a protein-to-creatinine ratio to account for urine concentration.)