Nutrients
Iron Saturation
Unit: %ID: N011
What This Test Measures
Percentage of transferrin saturated with iron; calculated (iron/TIBC × 100)
Conventional vs. Functional Optimal Range
Conventional "Normal"
20-50% %Your doctor says you're "fine" anywhere in this range
Functional Optimal
24-35% %This 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
Iron saturation <20% = iron deficiency. >45% = possible hemochromatosis (genetic iron overload). Gabriel's optimal band is 24-35%. This is the most sensitive early marker for hemochromatosis (before ferritin rises high). Check fasting.
When This Test Is High
Iron overload, hemochromatosis (>50%)
When This Test Is Low
Iron deficiency (<20%)
Related Conditions
Hemochromatosis, iron deficiency anemia
Recommended Follow-Up
If >45%, screen for hemochromatosis (genetic test, ferritin); if <20%, find the cause of low iron with a clinician before taking iron