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What is A1c?

Your A1c number

Consider your A1c number (also known as "HbA1c" or "glycated hemoglobin") as a snapshot of your blood glucose levels over two to three months. Over time, glucose naturally attaches itself to your red blood cells. When this happens, the cell is considered "glycated". The more glucose in your blood, the more glycated A1c you have in your cells.

What’s an optimal A1c number?

The recommended A1c target for a person living with diabetes is 7% or lower—some people remember this figure as "lucky number 7". While your A1c number gives you and your doctor an idea of how your diabetes is being managed over time, it does not tell you about drastic drops and elevations in your day-to-day blood glucose levels during that period.

How do fluctuations in my blood glucose levels affect my overall health?

While drops (hypoglycemia) and peaks (hyperglycemia) in your blood glucose levels outside of your target zone can have an immediate impact on your sense of well-being, research shows that the long-term consequences of such fluctuations can be dangerous. Studies show that hyperglycemia can increase your risk of developing heart, eye and kidney disease. Your A1c is an important part of your diabetes management, but it cannot replace daily self-monitoring, which highlights how your body and blood glucose respond to meals, physical activity, medications, illness and stress over short periods of time.

How often should I test my A1c?

Generally, you should test your A1c no fewer than twice a year. Most healthcare professionals suggest testing every three months, which is the approximate lifespan of blood cells. Speak with your healthcare professional to determine where and how frequently you should test your A1c level.

Reducing your A1c value to a healthier level can decrease your risk of many diabetes-related complications, so you can live a fuller, healthier life.


Diabetes Quebec (2014). Diabetes Complications. Retrieved from: Accessed February 3 2021.

Medical News Today (2019). How can you lower your A1c levels? Retrieved from: Accessed February 3 2021.

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