What if your urine specific gravity is 0.999?

A urine specific gravity of 0.999 is unusually low, indicating very dilute urine, which may suggest conditions such as excessive fluid intake, Diabetes insipidus, or kidney issues affecting concentration ability. It could also occur if a sample is contaminated with water or if it's improperly collected. It's essential to consult a healthcare professional for further evaluation and possible testing to determine the underlying cause.