If you’ve been told you’re prediabetic, the single most important thing to know is that this is reversible. Losing just 5% to 7% of your body weight can cut your risk of developing type 2 diabetes by 58%. For someone who weighs 200 pounds, that’s 10 to 14 pounds. The changes that get you there are straightforward, and they work.
Prediabetes means your blood sugar is higher than normal but hasn’t crossed into diabetes territory. On an A1C test, which measures your average blood sugar over the past two to three months, prediabetes falls between 5.7% and 6.4%. Below 5.7% is normal; 6.5% or above is diabetes. That gap between 5.7% and 6.4% is your window to act.
Why Prediabetes Isn’t “Pre” Enough to Ignore
The name makes it sound like a warning that comes before the real problem. But prediabetes carries its own health risks right now, not just in the future. It’s independently associated with a higher risk of coronary heart disease, stroke, and heart failure. People with prediabetes also show a higher rate of microvascular complications, the kind of small-blood-vessel damage to the eyes, kidneys, and nerves that most people associate only with full diabetes.
Prediabetes also tends to travel with other conditions: high blood pressure, unhealthy cholesterol levels, and excess weight around the midsection. Together, these form what’s called metabolic syndrome, and they compound each other’s damage to your cardiovascular system. Treating prediabetes means addressing this whole cluster, not just your blood sugar number.
Start With What You Eat
You don’t need a special “prediabetes diet.” The core principle is managing carbohydrates, because carbs are what raise blood sugar most directly. That doesn’t mean eliminating them. It means being deliberate about how much you eat at once and what kind.
One practical framework is carb counting. A single carb serving is about 15 grams of carbohydrates, roughly equivalent to a slice of bread or a small apple. The goal is to eat roughly the same amount of carbs at each meal rather than loading up at dinner and skipping them at breakfast. Spreading your carb intake evenly across the day keeps blood sugar more stable and avoids the sharp spikes that stress your body’s insulin response.
There’s no universal gram target that works for everyone. The right amount depends on your age, weight, and activity level. But a few principles hold across the board:
- Choose complex carbs over simple ones. Whole grains, beans, and vegetables break down slowly. White bread, sugary drinks, and processed snacks hit your bloodstream fast.
- Prioritize fiber. The Dietary Guidelines for Americans recommend 22 to 34 grams of fiber per day depending on age and sex. Fiber slows digestion, blunts blood sugar spikes, and helps you feel full longer. Vegetables, legumes, whole grains, nuts, and seeds are the best sources.
- Pair carbs with protein or fat. Eating a piece of fruit with a handful of nuts, or having chicken with your rice, slows the absorption of sugar into your blood.
You don’t need to overhaul everything at once. Swapping sugary drinks for water, choosing brown rice over white, and adding a vegetable to every meal are changes that add up quickly.
Exercise Lowers Blood Sugar Directly
Physical activity does something medication can’t fully replicate: it makes your muscles pull sugar out of your bloodstream for energy, even when your insulin isn’t working efficiently. This effect lasts for hours after you stop moving.
The target is 150 minutes of moderate-intensity activity per week. That’s 30 minutes a day, five days a week. “Moderate intensity” means you’re breathing harder than normal but can still hold a conversation. Brisk walking counts. So does cycling, swimming, dancing, or mowing the lawn.
Resistance training (lifting weights, using resistance bands, or doing bodyweight exercises like squats and push-ups) adds a second benefit. Building muscle mass increases the number of cells that can absorb blood sugar, which improves your insulin sensitivity around the clock, not just during a workout. Aim for two sessions per week in addition to your cardio.
If you’re currently sedentary, don’t worry about hitting 150 minutes right away. Walking for 10 minutes after each meal is a realistic starting point, and post-meal walks are especially effective at flattening blood sugar spikes.
The Weight Loss That Matters Most
You don’t need to reach an “ideal” weight. The research on this is clear and encouraging: losing 5% to 7% of your current body weight is enough to dramatically change your trajectory. That modest loss reduces your diabetes risk by 58%. If you’re over 60, the benefit is even greater, with risk dropping by 71%.
The CDC runs a program called the National Diabetes Prevention Program specifically built around this goal. It’s a year-long, structured lifestyle change program available in person and online across the country. Participants work with a coach on eating habits, physical activity, and problem-solving barriers. Many insurance plans cover it, and it’s worth checking whether a program operates near you or through your health plan.
The key insight from the research behind this program is that the combination of dietary changes, regular movement, and modest weight loss is more effective than any single intervention alone. You don’t need to be perfect at all three. You need to be consistent at some combination of them.
When Medication Enters the Picture
Lifestyle changes are the first-line treatment for prediabetes, and for most people, they’re enough. But for some, medication becomes part of the plan. The most commonly discussed option is metformin, a drug that reduces the amount of sugar your liver releases into your bloodstream and helps your body use insulin more effectively.
The American Diabetes Association’s guidelines suggest considering metformin for people with prediabetes who have additional risk factors, particularly those with a BMI of 35 or higher. Despite these recommendations, metformin is underused in this population. If you have a high BMI and your blood sugar isn’t responding to lifestyle changes alone, it’s a conversation worth having with your doctor.
Metformin isn’t a substitute for diet and exercise. It works best alongside those changes, and its effect on diabetes prevention is smaller than what lifestyle changes achieve on their own.
Tracking Your Progress
Once you’ve been diagnosed with prediabetes, your A1C should be retested regularly to see whether your numbers are moving in the right direction. Most providers will recheck at least once a year, though some may test more frequently if you’re making active changes and want to see results sooner.
An A1C that drops below 5.7% means you’ve moved back into the normal range. That’s a real, measurable reversal. An A1C that stays stable in the prediabetic range means your changes are preventing progression. An A1C that climbs toward 6.5% is a signal to intensify your approach.
Beyond A1C, pay attention to the other markers that tend to cluster with prediabetes. Blood pressure, cholesterol, and waist circumference all matter. Improvements in these numbers reduce your cardiovascular risk even if your A1C hasn’t budged yet. The goal isn’t just to avoid a diabetes diagnosis. It’s to protect your heart, kidneys, nerves, and blood vessels from damage that’s already possible at this stage.