Diabetes Management in the UK: What Your HbA1c Isn't Telling You

What HbA1c Actually Measures \u2014 and Its Limitations

HbA1c is a blood test that shows your average blood sugar over the past 2-3 months. It's the main number your diabetes team tracks, and the target for most people with Type 2 diabetes is below 48 mmol/mol (6.5%). But HbA1c has blind spots. It doesn't show the daily highs and lows. Someone with an HbA1c of 53 might have steady blood sugar, or they might be swinging between dangerously high and dangerously low all day \u2014 the average looks the same. If you're on insulin or a medication that can cause low blood sugar (like gliclazide), ask about a continuous glucose monitor (CGM) or at least regular finger-prick testing.

The Medications You Should Know About

Metformin is still the first-line drug for Type 2 diabetes, and for good reason \u2014 it's been around for decades, it's cheap, and it works. But the newer drugs are genuinely exciting. SGLT2 inhibitors (dapagliflozin, empagliflozin, canagliflozin) not only lower blood sugar but also protect your heart and kidneys \u2014 major benefits if you're at risk of heart disease. GLP-1 receptor agonists (semaglutide, liraglutide, dulaglutide) help with blood sugar and often cause significant weight loss. If you're on metformin alone and your HbA1c is above target, ask your doctor about adding one of these newer options. They're now recommended in NICE guidelines.

The 8 Care Processes You Should Be Getting Every Year

The NHS has 8 care processes that every person with diabetes should receive annually. These are: HbA1c check, blood pressure measurement, cholesterol test, kidney function test (urine albumin and blood creatinine), eye screening, foot check, BMI measurement, and smoking status review. In practice, many people miss some of these. Only about 40% of people with Type 2 diabetes receive all 8 annually. Check your records \u2014 your GP surgery should have a diabetes annual review. If you haven't had one, book it. The eye screening and foot checks are particularly important because diabetes can damage eyes and nerves without you noticing.

Preventing Complications: What Actually Works

The biggest risks from diabetes are heart disease, kidney damage, nerve damage, and eye problems. The good news is that these are largely preventable with good management. Blood pressure control is at least as important as blood sugar control \u2014 target below 140/80 for most people. Cholesterol management with a statin reduces heart attack risk by about 25%. If you smoke, stopping is the single most impactful thing you can do. Regular exercise (150 minutes per week of moderate activity) improves blood sugar control as effectively as some medications. And getting your kidneys checked annually means problems can be caught early, when treatment is most effective.

When to Push for Better Care

If your HbA1c has been above target for more than 6 months without a change in your treatment plan, something needs to happen. Either the current medications aren't enough, the dose needs adjusting, or there's something else going on. Don't accept 'let's just keep monitoring' if nothing is improving. Ask for a referral to a diabetes specialist nurse or consultant if your GP surgery isn't providing enough support. In some areas, structured education programmes like DESMOND (for Type 2) or DAFNE (for Type 1) are available free \u2014 these are genuinely useful and give you practical tools for day-to-day management.

Living Well: Beyond the Medical Stuff

Diabetes management isn't just about medications and blood tests. What you eat, how you move, how you sleep, and how you manage stress all affect your blood sugar. You don't need a special 'diabetic diet' \u2014 that concept is outdated. Focus on reducing processed foods and refined carbohydrates, eating more vegetables, and paying attention to portion sizes. The Mediterranean diet has the strongest evidence for improving blood sugar and heart health. If you can afford it, a few sessions with a registered dietitian (look for 'RD' after their name) can be transformational \u2014 especially one who specialises in diabetes.