Kidney
Glomerular Filtration Rate (GFR)
Unit: mL/min/1.73m²ID: M020
What This Test Measures
Kidney filtration rate; calculated from creatinine
Conventional vs. Functional Optimal Range
Conventional "Normal"
>60 mL/min/1.73m²Your doctor says you're "fine" anywhere in this range
Functional Optimal
90-160 mL/min/1.73m²This is where you actually feel great
The gap between these ranges is why you feel terrible with "normal" labs. Conventional medicine waits for disease. Functional medicine optimizes for health.
Gabriel's Take
GFR <60 = chronic kidney disease. Gabriel's optimal band is 90-160. GFR 60-90 = reduced reserve, warrants monitoring. GFR declines with age, but shouldn't drop below 60 until very old age if kidneys are healthy. Protect kidney function early.
When This Test Is High
Usually not concerning (unless very high = hyperfiltration)
When This Test Is Low
Chronic kidney disease, declining kidney function
Related Conditions
CKD stages: <60=Stage 3, <30=Stage 4, <15=Stage 5
Recommended Follow-Up
If <90, monitor annually; if <60, evaluate for CKD causes; optimize BP, glucose, avoid NSAIDs