Kidney Function

$109.00

Results: 1 to 3 days

Collection: blood draw

Biomarkers: 6

How important are the kidneys? As your body’s built-in purification system, the kidneys filter about 50 gallons of blood every single day — quietly removing toxins, balancing minerals, and keeping your body in homeostasis.

How to order: all Kidney Function tests are included as part of The Essentials+ BioMap. A stand-alone Kidney Function panel is not for sale at this time.

BioMap included tests are listed below.

    • Reference range: 0.52–1.27 mg/L

    • Optimal range: 0.60–0.95

    • Cystatin C is a more sensitive marker than creatinine for detecting early-stage kidney problems.

    • Kidney disease often progresses slowly and silently, often without obvious symptoms—Cystatin C monitoring provides an early warning of kidney disfunction.

    • Reference range: >59 mL/min

    • Optimal range: >90

    • eGFR (estimated Glomerular Filtration Rate) is the rate at which the kidneys can process the elements in the blood so they can be eliminated through urine.

    • eGFR is calculated by the laboratory directly from the measured Cystatin C value.

    • Lab measured Cystatin C concentration gets plugged into a formula—along with your age and gender—to calculate eGFR (estimated Glomerular Filtration Rate).

    • Reference range: 7–25 mg/dL

    • Urea, measured as blood urea nitrogen (BUN), is a waste product derived from the natural breakdown of protein in the liver.

    • Urea is excreted in the urine after blood is filtered through the kidneys.

    • The urea nitrogen level reflects both the metabolism of protein and the effectiveness of the kidneys in filtering blood.

    • Reference range: 0.60–1.29 mg/dL

    • Creatinine is derived from muscles and released into the blood. It is removed from the body by the kidneys. When the creatinine level is elevated, a decrease in kidney function is suggested.

    • Clinically, Cystatin C is considered to be a more sensitive marker than creatinine for detecting early-stage kidney problems.

    • Reference range: 6–22 (calculated)

    • The BUN/creatinine ratio is a calculated value derived by dividing the urea nitrogen result by the creatinine result.

    • This ratio can be helpful in determining whether elevated urea nitrogen is due to impaired kidney function or to other factors such as dehydration, urinary blockage or excessive blood loss.

    • Reference range: <7 mcg/L

    • Aluminum is a neurotoxin with no known physiological benefit to the human body.

    • Aluminum toxicity is typically slow and cumulative, especially in those with kidney dysfunction.

    • Aluminum toxicity is most damaging to the kidneys, brain, bones, and blood. It impairs cognitive function, weakens the immune system, disrupts red blood cell production, and contributes to bone disease—especially dangerous in people with poor detox capacity or chronic exposure.