Urinalysis (UA)

A urinalysis is one of the most versatile and widely used screening tests in all of medicine — and for good reason. From a single, non-invasive urine sample, it provides a quick window into several different body systems at once: the urinary tract, the kidneys, the liver, and the body's metabolic and blood-sugar status. Because many conditions affecting these systems are silent in their early stages, a urinalysis can flag a developing problem before any symptoms appear, making it a valuable first-line check for both routine wellness and the investigation of specific symptoms.

This test measures 10 key chemical and cellular markers in the urine, each of which offers a clue about what's happening inside the body.

Who this test is for

• Routine and preventive health screening, including general wellness checks
• Symptoms of a urinary tract infection — burning, urgency, frequency, or cloudy urine
• Screening for or monitoring diabetes, where sugar and ketones can show up in urine
• Kidney health checks, especially for anyone with high blood pressure, diabetes, or a family history of kidney disease
• Concerns about liver or gallbladder function
• Pregnancy, where it helps screen for preeclampsia and gestational diabetes
• Blood in the urine, unexplained fatigue, or other symptoms warranting a broad first look
• Anyone wanting a simple, inexpensive snapshot of overall health

What each marker reveals

• Specific gravity — how concentrated the urine is, reflecting hydration status and the kidneys' ability to concentrate urine.
• pH — the acidity or alkalinity of urine, which can relate to diet, kidney function, certain infections, and kidney-stone risk.
• Leukocyte esterase — a marker of white blood cells, signaling inflammation or infection in the urinary tract.
• Nitrites — produced when common UTI bacteria convert nitrates in the urine; a positive result strongly suggests a bacterial infection.
• Protein — protein in the urine can be one of the earliest signs of kidney stress or damage, and is also monitored in high blood pressure and pregnancy.
• Glucose — sugar in the urine can indicate diabetes or elevated blood sugar, since the kidneys spill glucose when blood levels run high.
• Ketones — can appear with uncontrolled diabetes, fasting, low-carb diets, or illness, and are important to catch when elevated.
• Bilirubin — not normally present in urine; its appearance can point to liver disease or a bile-duct problem.
• Urobilinogen — abnormal levels may indicate liver disease or the breakdown of red blood cells.
• Blood — blood in the urine can stem from a UTI, kidney stones, kidney disease, or other conditions, and always warrants a closer look.

Why it's worth doing

• Broad reach from one simple sample. Few tests screen this many systems — urinary, kidney, liver, and metabolic — at once, with nothing more than a urine sample.
• Catches problems early. Many of the conditions it screens for are silent at first, so a urinalysis can surface them before symptoms develop.
• Fast, non-invasive, and accessible. It's quick, painless, and an efficient starting point that helps determine whether more focused testing is needed.