The Glycation Process
Glycation occurs when glucose in the blood sticks to hemoglobin in red blood cells. Because red blood cells live for about 3 months, this marker acts as a biological "weighted average" of your metabolic health.
1
Dawn Phenomenon
Consistent morning spikes can inflate your A1c even if your daytime levels are stable.
2
Red Blood Cell Life
Conditions like anemia can falsely lower your A1c by shortening red blood cell lifespan.
Optimal Hemoglobin A1c Benchmarks
Functional Range (Metabolic Health Focused) 4.8% - 5.3%
Standard Lab Range 4.0% - 5.6% (Normal)
Common Questions
Why is my A1c high if my fasting glucose is normal?
Fasting glucose is a snapshot; A1c captures post-meal spikes that you might be missing during the day.