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Have you ever received a blood test report and wondered what “HbA1c: 7.8%” actually means? You may have seen the number but felt unsure about whether it is normal or what you should do next.

Your HbA1c test shows your average blood sugar level over about three months. It helps you and your doctor understand how well your blood sugar has been controlled over time.

In this blog, we will explain what HbA1c measures, what the different numbers mean, why the test matters, and how often you may need to repeat it.

If you are helping your parent, spouse, or another family member manage diabetes, understanding this number can also help you support them better.

First, what is this number actually measuring?

HbA1c is a blood test that helps show your average blood sugar level over the past three months.

Your red blood cells contain a protein called haemoglobin, which carries oxygen around your body. When sugar is present in your blood, some of it sticks to this protein. This is called glycation. Since red blood cells usually live for about three months, the amount of sugar stuck to haemoglobin gives an idea of your average blood sugar during that time.

HbA1c vs Fasting Sugar vs Post-Meal Sugar

Think of a fasting sugar test as a photo of your blood sugar at one moment. HbA1c is like a video showing the bigger picture over the past three months.

If your doctor has asked only for an HbA1c test, you usually do not need to fast. However, if you are also having a fasting sugar test or a cholesterol test, follow the lab's instructions.

HbA1c does not show every rise in blood sugar after meals. That is why doctors may check it along with other blood sugar tests.

So how do you read the percentage?

Your HbA1c result is shown as a percentage. This number helps your doctor understand your average blood sugar and whether you may have prediabetes or diabetes.

Understanding Your HbA1c Levels

These ranges follow commonly used guidelines, including those recognised in India. A result of 6.5% or above falls in the diabetes range, but a doctor may need to repeat the test or check another blood sugar test to confirm the diagnosis, especially if you have no clear symptoms.

What should your HbA1c target be?

For many adults with type 2 diabetes, a target below 7% may be suitable. Some younger adults without major health problems may be advised to aim closer to 6.5%. Older adults, people who are frail, or those who often experience low blood sugar may need a less strict target, such as 7.5% to 8%.

Your target should be set with your doctor based on your age, health, medicines, and risk of low blood sugar. Do not change your treatment based on these numbers alone.

If your result falls in the prediabetes range, do not lose hope. This is an important stage when changes to food habits, activity, and other daily habits may help lower your risk of developing diabetes.

But why does one percentage point deserve this much attention?

A single blood sugar reading tells you what your sugar level was at that moment. Your HbA1c gives a wider view of how your blood sugar has been doing over the past three months.

When blood sugar stays high for a long time, it can harm different parts of your body, including your eyes, kidneys, nerves, and heart. Keeping your blood sugar within your personal target can help lower the risk of these problems.

A major study called UKPDS found that each one-point drop in HbA1c was linked to a 37% lower risk of small blood vessel problems, including some eye and kidney complications, among people with type 2 diabetes. This was a link seen in the study, not a guarantee for every person.

Diabetes is an important health concern in India. It can develop without clear warning signs, so regular checks are useful, especially if you have risk factors or a family history of diabetes.

Small daily habits can make a difference.

Here are a few steps that may help you manage your blood sugar:

• Take a short walk after meals: A walk after eating can help you stay active and support blood sugar control.
• Balance your meals: Pay attention to rice portions and include vegetables, protein-rich foods, and other healthy choices.
• Take your medicines on time: Follow the plan given by your doctor. Do not stop or change medicines on your own.
• Get enough sleep and manage stress: Poor sleep and stress can affect blood sugar levels.

Your HbA1c is not a mark on a report card. It is feedback about the past few months and can help you and your doctor decide what to do next.

Before you act on any number, one caution is worth knowing.

Although HbA1c is a useful test, certain health conditions can affect the result. This means the number may not always give a true picture of your average blood sugar.

For example, iron-deficiency anaemia can sometimes make your HbA1c result appear higher than it really is. Thalassaemia trait, some other blood conditions, recent blood loss, a blood transfusion, and long-term kidney disease may also affect the result. The effect can vary depending on the condition and the test method used.

During pregnancy, doctors may prefer other tests for checking blood sugar, depending on the stage of pregnancy and the reason for testing.

These points matter because anaemia and some blood conditions affect many people in India. If you have anaemia, thalassaemia trait, kidney disease, or a recent blood transfusion, tell your doctor before interpreting your result.

Your doctor may suggest a fasting or post-meal blood sugar test to get a clearer picture. Using the same lab for repeat tests, when possible, can also make it easier to compare your results over time.

Now, how often should you repeat this test, and what should you do next?

How often you need an HbA1c test depends on your blood sugar levels, treatment plan, and doctor's advice.

Here is a simple guide to help you plan your next test.

How often should you repeat the test?

• Every 3 months: If you are taking diabetes treatment and your blood sugar is not yet within your target, or if your doctor has recently changed your treatment.
• Every 6 months: If your blood sugar is stable and you are meeting your target.
• At least once a year: If you have prediabetes, or more often if your doctor advises it.

Repeating the test too soon may not show the full effect of changes to your food habits, activity, or treatment. Your doctor can help decide the right time for your next test.

Before and after your HbA1c test

Use this checklist to stay on track:

• Keep a record of your HbA1c results and the dates of each test.
• Take your latest report and home blood sugar readings to your doctor.
• Ask what your personal HbA1c target should be.
• Check whether your medicines need any changes.
• Ask when you should repeat the test.
• If you are helping a family member, support them by keeping track of test dates, meals, and medical visits.

Do not wait for your next scheduled test if your blood sugar readings are very high, you have repeated episodes of low blood sugar, or you notice symptoms such as extreme thirst or blurred vision. Contact your doctor for advice.

Remember, the aim is not just to get a lower number. It is to manage your blood sugar safely and protect your health over time.

If you are looking for a convenient place to get your blood sugar checked regularly, here is an option to consider.

If you are looking for lab tests in West Tambaram, Indian Scan offers blood tests and health check-up packages with detailed reports. You can also ask about combining your blood sugar tests with a lipid profile or liver function test during the same visit.

To learn more or arrange your test, call 8233 433 533 or visit Indian Scan to book an appointment.

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