Urine Urobilinogen

Kidney Function marker

Urine Urobilinogen

Category: Kidney Function
Unit: E.U./dL

A breakdown product of bilirubin formed by gut bacteria; a small amount is reabsorbed and appears normally in urine. Small quantities are expected, so both a modest positive and a negative can be normal. Markedly increased levels point to increased bilirubin turnover or impaired hepatic handling.

PED Notes

Urine urobilinogen rises in two situations relevant to enhanced athletes: haemolysis (increased red-cell breakdown delivers more bilirubin to the gut) and liver dysfunction (a strained liver clears less reabsorbed urobilinogen). Oral 17-alpha-alkylated AAS impose real hepatic strain, so an elevated urine urobilinogen alongside raised ALT/AST, GGT, or bilirubin adds to the picture of AAS-related cholestasis or hepatocellular stress and is worth heeding. Conversely, a completely absent urobilinogen with pale stools and dark urine can suggest biliary obstruction. It is a crude screening finding, not a standalone diagnosis: always confirm with serum liver enzymes, bilirubin (total, direct, indirect), and a haemolysis workup (haptoglobin, LDH, reticulocytes) rather than acting on the dipstick alone.

When high

When urine urobilinogen is elevated:

  • Confirm and characterise with serum tests rather than treating the dipstick: check ALT, AST, GGT, ALP, and total/direct/indirect bilirubin, plus haemolysis markers (haptoglobin, LDH, reticulocyte count).
  • If the picture points to AAS-related hepatic strain (raised liver enzymes, oral 17-aa compounds on board):
    • Reduce or discontinue oral AAS; favour injectable esters that bypass first-pass liver metabolism
    • Consider liver-support agents such as TUDCA (500-1000mg/day) and NAC (600-1200mg/day), which have supportive evidence for cholestatic strain
    • Recheck liver panel after a washout period
  • If haemolysis is the driver, identify and address the cause; significant haemolysis warrants medical review.

Interpretation note:

  • A trace-to-small urobilinogen is normal. The two abnormal directions that matter are clearly increased (haemolysis or liver dysfunction) and absent with obstructive jaundice features (dark urine, pale stools), which warrants prompt medical assessment. Correlate with the serum liver panel every time.

History Chart

Reading History

Frequently Asked Questions

Reference Ranges

Standard Range

0.1 - 1 E.U./dL

VitalMetrics Range

0.1 - 1 E.U./dL

Statistics