Laboratory Reference Guide

A quick reference for common tests

This table is a starting point for orientation, not a substitute for lab-specific reference ranges, which vary by laboratory and individual circumstances.

TestWhat it measuresSample type
eGFREstimated overall kidney filtering capacityBlood (calculated)
CreatinineMuscle waste product filtered by the kidneysBlood
Cystatin CAlternative/complementary kidney function markerBlood
Urine Albumin (UACR)Protein leakage, an early sign of kidney stressUrine
Blood PressureVascular health, closely linked to kidney functionCuff measurement
Basal TemperatureSelf-monitoring measure discussed alongside thyroid testingHome measurement

Specific reference ranges vary by laboratory, age, sex, and individual health history. Always interpret results with a qualified healthcare provider.