HbA1c: what your average blood sugar tells you

HbA1c — glycated haemoglobin — is one of the most useful blood tests for understanding blood sugar. Unlike a finger-prick glucose reading, which only captures a single moment, HbA1c reflects your average blood sugar over roughly the previous three months. That makes it far harder to game with a good breakfast, and far more meaningful as a trend.

How it works

When sugar is in your bloodstream, some of it attaches to haemoglobin, the protein in your red blood cells. The more sugar there has been, on average, the more glycated haemoglobin builds up. Because red cells live for about three months, HbA1c gives a rolling average over that window — a running score rather than a snapshot.

Why it matters for prevention

Blood sugar tends to creep up slowly and silently. HbA1c is valuable precisely because it can reveal that drift before symptoms appear, while there is still plenty of room to act through diet, movement and weight. It is one of the markers where testing early and regularly genuinely changes what you can do about it.

Reading your result

Rather than memorising cut-offs, the most useful thing is to know your number, understand which direction it is heading, and have a clinician interpret it alongside the rest of your results. A value that is stable and low is reassuring; one that is trending upward is a prompt to act — and that is the conversation ProGen Health is built around.