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A 33-year-old member asked:

What is urine composed of?

2 doctor answers7 doctors weighed in
Dr. Quresh Khairullah
Nephrology and Dialysis 43 years experience
Water ,waste,salts: Urine is made from blood filtering through the kidneys.Waste which are several chemicals generated from what you eat are eliminated , also excesss water and salts such as sodium and pottassium are also regulated.Acid base balance is also one of the many functionsof the kidney acheived from making urine.
Dr. Craig Smith
Urology 36 years experience
Mostly water: Urine is mostly water (about 95% water), however, the rest of the contents of urine can vary depending of what you've eaten, drank, breathed or been exposed to. The remainder of urine usually consists of urea, uric acid, ammonia, hormones, dead blood cells, proteins, salts and minerals, and toxins.

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Last updated Jun 7, 2018

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