Lab marker · Low

Low Urine specific gravity: what it means

A Urine specific gravity result below the normal range is considered low. Here is what a reduced Urine specific gravity can point to, and when it is worth discussing with a doctor.

Reference range: ~1.005–1.030; how concentrated the urine is — high with dehydration, low with over-hydration or when the kidneys cannot concentrate urine

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What a low Urine specific gravity can mean

  • Over-hydration — dilute urine after drinking a lot of fluid.
  • Reduced ability to concentrate urine — in some chronic kidney disease.
  • Diabetes insipidus — the kidneys cannot concentrate urine, producing large volumes of dilute urine.
  • A 'fixed' value near that of blood — can suggest the kidneys have lost their concentrating ability.

When to discuss with a doctor

Urine specific gravity is a quick, supportive measure rather than a decisive test on its own. Most often it simply reflects how hydrated you are at the moment of the sample, so a high or low value in isolation is usually not a concern. Its more meaningful use is as one clue to how well the kidneys can concentrate urine: urine that stays persistently dilute despite dehydration, or a 'fixed' value, can point toward reduced kidney function or a water-balance disorder, and is followed up with more specific tests such as urine and serum osmolality. It is always read within the whole urinalysis and clinical picture. Mediora.AI shows specific gravity alongside the rest of the urinalysis and kidney markers so the concentration and hydration pattern is visible; interpreting it belongs with your doctor.

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Mediora.AI is informational - interpretation, not a diagnosis. A single out-of-range value is common and often benign; always discuss decisions with your doctor.