Urea is a nontoxic byproduct of nitrogen (ammonia) detoxification. It is formed in the liver via the urea cycle and is the end product of protein metabolism. It is essentially a waste product with no physiological function.

Urea is a nontoxic byproduct of nitrogen (ammonia) detoxification. It is formed in the liver via the urea cycle and is the end product of protein metabolism. It is essentially a waste product with no physiological function.

Urea is the final excretory product of nitrogen (protein) metabolism in the body.

Urea is the principal nitrogenous waste product of metabolism and is generated from protein breakdown.

Likely to form uric acid stones; some people who have increased uric acid also have gout

Uric acid is a natural byproduct formed during the breakdown of our body’s cells and the food that we eat. Excess uric acid can be caused by either an overproduction of uric acid or inefficient removal of it from the blood. The most common affliction associated with excess uric acid is gout, a painful form of arthritis.

May indicate oxidative stress and elevated levels are associated with cardiovascular disease and diabetes. May be elevated due to gout, kidney dysfunction, excess alcohol intake, starvation, extreme calorie restriction, liver dysfunction, hemolytic anemia, excess fructose consumption, fungal infection, ketogenic diet, supplemental niacin, high protein diet, prolonged fasting, supplemental vitamin B3, excess acidity. May be decreased due to nutrient deficiencies (molybdenum, zinc, iron), oxidative stress, low purine intake (vegetarian or vegan), excess alkalinity.

Uric acid is a waste product formed when the body breaks down purines, which are natural substances found in certain foods and cells. Uric acid levels are commonly assessed through blood tests as part of a metabolic or comprehensive health evaluation. In females, the normal reference range for uric acid is generally lower compared to males due to hormonal differences, particularly the effects of estrogen, which promotes uric acid excretion by the kidneys.

Uric acid, a key biomarker assessed through a 24-hour urine test, holds significant clinical relevance in diagnosing and managing various metabolic and renal disorders. Chemically, uric acid is the end product of purine metabolism in humans, arising predominantly from the dietary breakdown of nucleic acids and, to a lesser extent, endogenous purine synthesis. Normally, it is soluble in the blood, filtered by the kidneys, and excreted in urine. However, deviations in its urinary concentration can be indicative of pathological states. Elevated urinary uric acid levels, or hyperuricosuria, can signal conditions such as gout, a form of arthritis characterized by the deposition of monosodium urate crystals in joints due to hyperuricemia.

Urine creatinine is a crucial marker on an Organic Acids panel, primarily used to assess kidney function and the overall adequacy of urine concentration. Creatinine is a waste product formed from the normal breakdown of muscle tissue and is excreted through the kidneys. Its levels in urine are often evaluated to ensure proper kidney filtration and are used as a baseline to interpret other metabolites on the Organic Acids panel. When urine creatinine is low, it may indicate diluted urine, potentially affecting the accuracy of other metabolite readings. Conversely, high urine creatinine levels might suggest dehydration or impaired kidney function. Monitoring urine creatinine is essential for accurate assessment of metabolic processes and to help rule out issues related to kidney health.

Occult blood in urine is detected on a urinalysis dipstick test. Normal result: negative. A positive result — reported as Trace, 1+, 2+, or 3+ — indicates blood or haemoglobin in the urine (hematuria) and requires clinical interpretation. Common causes include urinary tract infections, kidney stones, vigorous exercise, and menstruation. Most cases of trace or 1+ occult blood in otherwise healthy individuals have benign causes.

Urine pH measures how acidic or alkaline your urine is on a scale from 4.5 to 8.0, with lower numbers indicating more acidic urine and higher numbers indicating more alkaline urine. A pH of 7 is neutral; below 7 is acidic; above 7 is alkaline. Normal urine pH ranges from approximately 4.5 to 8.0, with most healthy adults producing slightly acidic urine around pH 5.5–6.5 under typical dietary conditions. Urine pH is measured as part of a standard urinalysis and is influenced by diet, hydration, medications, and underlying health conditions. Very low or very high pH can indicate kidney stones, urinary tract infections, metabolic conditions, or dietary extremes.

Urinalysis is a series of tests that analyze the chemical composition of urine to assess overall health. One important measurement in urinalysis is urine specific gravity (SG), which indicates the concentration of substances in the urine. This is typically done by dipping a test strip into the urine, where chemical reactions cause color changes that are then analyzed.

What Is Urine Specific Gravity?

Urine specific gravity measures how concentrated urine is compared to pure water. The specific gravity of water is 1.000, and urine with no dissolved substances would have a similar reading. However, since urine naturally contains dissolved substances like salts, minerals, and waste products, a specific gravity of 1.000 is not possible in humans.

Urobilinogen is a byproduct of bilirubin breakdown by intestinal bacteria, and small amounts are normally found in urine. The normal range on most urinalysis dipstick tests is 0.2–1.0 mg/dL — a result of 0.2 mg/dL is normal and does not indicate disease. High urobilinogen (above 1.0–2.0 mg/dL) may indicate liver disease or hemolytic anemia. Absent or very low urobilinogen may indicate bile duct obstruction. Results are most useful when interpreted alongside urine bilirubin and other clinical findings.

Urobilinogen is formed when the body breaks down bilirubin, and small amounts in urine are normal. A dipstick test reports urobilinogen in broad categories (Normal, 1+, 2+, 4+, 8+) rather than exact numbers. Higher-than-normal results may signal liver disease (such as hepatitis), bile duct issues, or increased red blood cell breakdown (hemolysis), while very low or absent levels, though less common, can occur with complete bile duct obstruction. If levels are 1+ or higher, your clinician may recommend blood tests (bilirubin, AST, ALT, ALP, GGT), a complete blood count, or imaging, and you should mention any symptoms like jaundice, dark urine, pale stools, abdominal pain, fever, or fatigue. Because certain medications or poor sample handling can affect the test, repeat testing is sometimes advised, and the most accurate results come from a clean-catch, first-morning urine sample collected when you are well hydrated.

Porphyrins are a group of compounds defined by their chemical structure. These compounds are by-products of heme synthesis and are normally present at low levels in blood and other body fluids. Porphyrin tests measure porphyrins and their precursors in urine, blood, and/or stool.

Porphyrins are a group of compounds defined by their chemical structure. These compounds are by-products of heme synthesis and are normally present at low levels in blood and other body fluids. Porphyrin tests measure porphyrins and their precursors in urine, blood, and/or stool.