Kidney blood tests and renal-function markers, including creatinine, eGFR, cystatin C and urea. Explore available tests with reference ranges and context for high or low results.
Kidney, electrolyte, autonomic, cardiac, liver, or nervous-system-adjacent markers often need symptom timing and pacing context to become useful.
What this category can do
Kidney blood tests and renal-function markers, including creatinine, eGFR, cystatin C and urea. Explore available tests with reference ranges and context for high or low results.
Pacing
Pacing makes biomarkers and symptom timing more actionable in everyday management.
Open heart-rate pacingPEM
When symptoms escalate later rather than immediately, a recovery-oriented reading becomes more important.
Open PEM durationWhitepapers
The whitepapers connect physiology, longitudinal interpretation, and Elara’s monitoring logic.
Open whitepapersIf this category is not enough
A category page organizes markers, but many users are actually trying to answer broader questions about fatigue, PEM, pacing, or structured symptom documentation.
Questionnaires
Use validated assessments when a biomarker category alone is too narrow for the underlying question.
PEM
When symptoms worsen after activity, the timing pattern can matter more than a category label.
ME/CFS
Use the illness hub when reduced capacity, fatigue, or multisystem symptoms are part of the larger picture.
Adjacent categories
Bilirubin in urine is a marker that can signal liver or bile duct disorders, as bilirubin is not normally excreted in urine.
Reference: negativ
Cystatin C is a protein produced by all nucleated cells that serves as an internal marker for kidney filtration rate. It is used to assess glomerular filtration rate (GFR) and detect kidney impairment.
Reference: 0,5–1,0 mg/l (laborabhängig)
Red blood cells in urine, known as hematuria, can be a sign of various urinary tract conditions. Most healthy individuals have few or no RBCs in their urine.
Reference: 0 - 5
eGFR estimates how well your kidneys filter waste from blood using the CKD-EPI formula. It's a key marker of kidney health.
Reference: 60 - 90
Urine glucose test measures the amount of sugar (glucose) excreted in the urine. Normally, little to no glucose is present; its detection can signal high blood sugar levels.
Reference: negativ
Uric acid is a waste product from the breakdown of purines, filtered by the kidneys and excreted in urine. Testing helps evaluate kidney function and gout risk.
Reference: 3.5 - 7.2
Ketones in urine are byproducts of fat breakdown. Their presence can be normal during fasting or low-carb diets, but high levels may signal diabetic ketoacidosis, a medical emergency.
Reference: negativ
Creatinine is a waste product from muscle activity, filtered by the kidneys. Blood levels help assess kidney function.
Reference: 0.5 - 0.9
Leukocytes in urine are white blood cells that can indicate inflammation or infection in the urinary tract, such as a bladder or kidney infection.
Reference: 0 - 5
Urine nitrite is a screening test for urinary tract infections, produced when certain bacteria convert nitrate to nitrite.
Reference: 0
Urine pH is a measure of how acidic or alkaline your urine is. It can provide insights into your metabolic state, kidney function, and risk of certain conditions like kidney stones.
Reference: 4.5 - 8.0
Urobilinogen is a breakdown product of bilirubin. Urine urobilinogen testing provides insights into liver function and the bile system.
Reference: 0 - 1
Common kidney-related tests include creatinine, estimated GFR (eGFR), cystatin C and urea. Urine albumin or protein may be added depending on the clinical question.
A higher creatinine or lower eGFR can suggest reduced kidney function, but isolated abnormalities can have other causes. Trends and clinical context are important.
