HbA1c

A hemoglobin A1C (HbA1C) test is a blood test that shows your average level of blood glucose, also called blood sugar, over the past two to three months.

Your blood glucose level changes all the time. If you're checking it at home, you are measuring what your blood glucose level is at that time. An A1C test gives you an average level of your blood glucose level over the past two to three months.

Source: MedlinePlus, U.S. National Library of Medicine

Normal range

2 published ranges, each from a named source
Normal
4–5.6 %
Ranges from American Board of Internal Medicine (Laboratory Test Reference Ranges).

All source ranges (2)

What an abnormal result can be associated with

A high result
Elevated hemoglobin A1c
Associations from LOINC2HPO (Human Phenotype Ontology). This is reference information, not a diagnosis: only a clinician can interpret your result in context.
details
Sample
Whole blood · LOINC
Part of
Bryan Johnson Blueprint
Monitored for
Hypertension · Type 2 diabetes
Code
LOINC 17856-6 · %
Also known as
Hemoglobin A1c/Hemoglobin total, Glycohaemogolobin, Glycohemogolobin, HA1c, Hgb A1c
See your own HbA1c Add a lab report and it is drawn against your lab's range, over time. Upload a Blood Test