Slightly more thirst
You may feel a little thirstier than usual as the body tries to flush out extra sugar — though it's mild at this stage.
Prediabetes means your blood sugar is higher than normal but not yet high enough to be type 2 diabetes. It's an early warning sign — and, caught in time, it's often reversible. This medically reviewed guide explains what prediabetes is, how it's diagnosed, and the realistic steps that can bring your blood sugar back to normal.
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Prediabetes is a stage where your blood sugar is higher than normal, but not yet high enough to be diagnosed as type 2 diabetes. A fasting reading of 100–125 mg/dL or an HbA1c of 5.7–6.4% falls in the prediabetes range. It almost never causes symptoms — so it's usually found only through a blood test.
Think of prediabetes as a yellow traffic light. Your body is starting to struggle with insulin — the hormone that moves sugar from your blood into your cells for energy — but the problem hasn't yet tipped into diabetes. The cells respond to insulin less well than they should (called insulin resistance), so a little extra sugar lingers in the blood.
The reason this matters so much is timing. At the prediabetes stage, the damage is early and largely reversible. With realistic changes to food, movement and weight, many people bring their blood sugar back to normal and avoid type 2 diabetes altogether — or delay it by years.
Values in mg/dL, measured after 8 hours without food. An HbA1c of 5.7–6.4% indicates prediabetes too. These are general reference ranges — only a doctor can confirm a diagnosis, usually with a repeat test. You can check any reading on our blood sugar chart.
Why it's easy to miss: prediabetes rarely causes thirst, tiredness or any clear warning sign. Most people feel completely normal — which is exactly why a simple test matters if you have risk factors like a family history, extra weight around the waist, or are over 35.
Prediabetes usually has no symptoms at all. Most people feel completely normal and only find out through a routine blood test. When subtle signs do appear, they can include slightly increased thirst, more frequent urination, mild tiredness, or dark, velvety skin patches on the neck — but these are easy to miss or blame on something else.
This "silent" nature is exactly what makes prediabetes risky — and why testing matters more than waiting for a warning sign. Blood sugar in the prediabetes range is only mildly raised, so it rarely produces the clear symptoms seen in full diabetes. If symptoms are noticeable, it often means blood sugar is already drifting toward the diabetes range.
You may feel a little thirstier than usual as the body tries to flush out extra sugar — though it's mild at this stage.
Passing urine a bit more often, sometimes at night, as the kidneys clear the small amount of excess sugar.
Feeling a little low on energy after meals, because cells aren't using sugar as efficiently as they should.
Velvety dark patches on the neck, armpits or knuckles (acanthosis nigricans) are closely linked to insulin resistance.
Because prediabetes is usually silent, the only reliable way to catch it is a simple blood test. A 2-minute risk check can tell you whether testing is worth it for you, based on your age, waist size and family history.
Take the 2-minute risk checkPrediabetes develops when your cells stop responding well to insulin — known as insulin resistance — so sugar builds up in the blood. This usually comes from a mix of excess weight (especially around the waist), low activity, a carb-heavy diet, genetics and age. There's rarely a single cause; risk factors add up over time.
The encouraging part is where most of that risk sits. The strongest, most common drivers of prediabetes are things you can actually influence — weight, movement and diet — which is exactly why prediabetes is so often reversible.
Indians face a higher risk of prediabetes and type 2 diabetes than many other populations — and often develop it younger, and at lower body weights. A few reasons stand out:
Understanding your risk is the first step to lowering it. Next, see exactly how prediabetes is diagnosed — and the simple blood tests that confirm it.
Prediabetes is diagnosed with a simple blood test. A fasting blood sugar of 100–125 mg/dL, an HbA1c of 5.7–6.4%, or a 2-hour post-meal reading of 140–199 mg/dL all indicate prediabetes. A doctor usually confirms it by repeating a test, since a single reading can be affected by illness, stress, or what you ate.
You don't need symptoms to be tested — in fact, because prediabetes is silent, testing is the only reliable way to find it. Here are the four common tests and the numbers that fall in the prediabetes range.
You can book a fasting sugar or HbA1c test with a home sample collection from a trusted lab — results usually within 24 hours, no clinic visit needed.
These are standard reference ranges — your doctor reads them alongside your history and may repeat a test to confirm. Confused by a result? You can convert HbA1c to average blood sugar with our free tool, then see how to bring your numbers back to normal.
Prediabetes can often be reversed without medication. The most effective steps are losing 5–7% of your body weight, moving for about 30 minutes most days, and shifting to a higher-fibre, lower-refined-carb diet. Large studies show these changes cut the risk of developing type 2 diabetes by more than half — often better than medication alone.
You don't need a perfect diet or a gym membership. The science is clear that small, steady changes — kept up over time — are what move blood sugar back toward normal. Here are the four that matter most.
Fill half your plate with vegetables and dal, add whole grains and protein, and cut back on white rice, sugar and fried snacks. It's about portions and balance — not starving.
Aim for about 30 minutes most days — a brisk walk counts. A short walk after meals is especially effective, because it helps your muscles use up sugar straight from the blood.
Losing just 5–7% of body weight — about 4–5 kg for many people — sharply lowers blood sugar, especially when it trims fat around the waist. You don't need to reach an "ideal" weight to benefit.
Poor sleep and ongoing stress both push blood sugar up. Aim for 7–8 hours of sleep and build in simple ways to unwind — these quietly support everything else you're doing.
Of everything on this list, losing 5–7% of body weight has the strongest, best-proven effect on reversing prediabetes — especially when the weight comes off around the abdomen. For someone weighing 70 kg, that's just 3.5–5 kg.
You don't have to give up Indian food — small swaps keep meals familiar while easing the sugar load.
For a full day-by-day plan, see our Indian diabetes diet guide — the same balanced approach works for prediabetes.
Reversing prediabetes is realistic for most people who start early. Next, see how to keep it from coming back — and when it's worth checking in with a doctor.
The same habits that reverse prediabetes also keep it away: a balanced plate, regular movement, a healthy weight, and routine blood sugar checks. Even after your numbers return to normal, the underlying tendency remains — so the goal is to make these changes lasting, not temporary. Re-testing once a year confirms you're staying on track.
Reversing prediabetes is the first win; keeping it reversed is the long game. The good news is that none of this requires perfection — just steady, sustainable habits that fit your life. Here's how to protect your progress.
Crash diets fade. Pick a few realistic swaps — smaller rice portions, a daily walk — and let them become routine rather than a short-term effort.
A yearly fasting sugar or HbA1c test confirms your blood sugar is staying in the normal range — and catches any early drift before it becomes a problem.
If you lost weight to reverse prediabetes, keeping it off is what locks in the benefit — especially the fat around your waist.
Regular activity keeps your cells sensitive to insulin. Aim to stay active most days — consistency matters more than intensity.
Not sure where your numbers stand right now? Take our free 2-minute risk check, or read on to see when it's worth speaking to a doctor.
See a doctor if a test puts you in the prediabetes range, or if you have risk factors like a family history of diabetes, extra weight around the waist, high blood pressure, PCOS, or are over 35. Because prediabetes is silent, a timely check is the smartest move — even when you feel completely fine.
You don't need to wait for symptoms. A short conversation and a simple blood test can confirm where you stand and help you build a plan. Consider booking a check if any of these apply to you:
A physician or an endocrinologist can confirm your status with a simple test and guide your next steps. Early action makes prediabetes far easier to reverse.
Quick, clear answers to the most common questions about prediabetes.
Prediabetes is a fasting blood sugar of 100–125 mg/dL, an HbA1c of 5.7–6.4%, or a 2-hour post-meal reading of 140–199 mg/dL. Below these values is normal; above them is the diabetes range. A doctor usually confirms prediabetes by repeating a test.
Yes — prediabetes can often be reversed, especially when caught early. Losing 5–7% of body weight, moving about 30 minutes most days, and eating a higher-fibre, lower-refined-carb diet can bring blood sugar back to normal and delay or prevent type 2 diabetes, frequently without medication.
No. Prediabetes raises the risk of type 2 diabetes, but it is not inevitable. Many people who make lasting lifestyle changes return their blood sugar to normal and never develop diabetes. Without any changes, a sizeable share do progress over time — which is why early action matters.
Prediabetes usually has no symptoms and is found through a blood test. When subtle signs do appear, they can include slightly increased thirst, more frequent urination, mild tiredness, or dark velvety skin patches on the neck — but these are easy to miss.
Prediabetes is diagnosed with a simple blood test — a fasting blood sugar, an HbA1c, or a post-meal or glucose tolerance test. A fasting reading of 100–125 mg/dL or an HbA1c of 5.7–6.4% indicates prediabetes. A doctor usually repeats the test to confirm.
Focus on a balanced plate: plenty of vegetables and dal, whole grains, and protein, with less white rice, sugar, refined flour and fried food. Simple Indian swaps — millets or smaller rice portions, whole-wheat roti, fruit instead of sweets — keep meals familiar while easing the sugar load. See our Indian diabetes diet guide for a full plan.
Most people with prediabetes should have their blood sugar checked at least once a year, or as advised by their doctor. Regular testing confirms whether lifestyle changes are working and catches any early drift toward diabetes before it becomes a problem.
No. Prediabetes means blood sugar is higher than normal but not yet high enough to be diabetes. It is an earlier, milder stage — and, unlike established diabetes, it is often fully reversible with lifestyle changes.
The estimate of 13 crore+ Indian adults with prediabetes1 is drawn from the ICMR–INDIAB study. Confirm the exact figure and access date against the latest published data before publishing.
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