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Urea Nitrogen (urine)

Urine_kidney Unit: g/24hr Urine test

Reflects protein catabolism and kidney clearance

Also known as: Urine Urea

Reference Ranges

Clinical Reference 12.0 – 20.0 g/24hr
Optimal Range 14.0 – 18.0 g/24hr

24-hour collection

Related Conditions

High Protein Diet High
Chronic Kidney Disease Low

Food & Lifestyle Recommendations

🍎 Food Adjust protein intake appropriately for kidney function Protein-kidney balance
🍎 Food Reduce excessive protein if kidney-compromised Protect kidney function

Evidence-Backed Supplements

When Low

  • Protein Tier B May Increase

    Increased protein intake raises urea excretion in healthy kidneys

    Whey/plant protein 1.0–1.5 g/kg/day Distributed
    PMID 32483625

Questions to Ask Your Doctor

  • Does this suggest reduced kidney clearance or low protein intake? Differential for low urinary urea

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