2 doctors weighed in:

What is the difference between hba1c and serum glucose?

2 doctors weighed in
Dr. William Lizarraga
Internal Medicine

In brief: A1c is average

The hemoglobin a1c is an average of your glucose over the prior 3 months or so.
There are tables online that let you convert the % of glycosylated hemoglobin to what your avg glucose has been.

In brief: A1c is average

The hemoglobin a1c is an average of your glucose over the prior 3 months or so.
There are tables online that let you convert the % of glycosylated hemoglobin to what your avg glucose has been.
Dr. William Lizarraga
Dr. William Lizarraga
Thank
Dr. Carlo Contreras
Surgery - Oncology

In brief: See below

Serum glucose is how much glucose (a type of sugar) is present in your blood at the exact minute your blood was drawn.
Hga1c is different. It actually looks at how much sugar is stuck to your blood cells and represents an "average" of how high your blood sugar has been every day for the last 3 months.

In brief: See below

Serum glucose is how much glucose (a type of sugar) is present in your blood at the exact minute your blood was drawn.
Hga1c is different. It actually looks at how much sugar is stuck to your blood cells and represents an "average" of how high your blood sugar has been every day for the last 3 months.
Dr. Carlo Contreras
Dr. Carlo Contreras
Thank
Get help from a real doctor now
Dr. Arnon Rubin
Board Certified, Internal Medicine
20 years in practice
163K people helped
Continue
108,000 doctors available
Read more answers from doctors