Prediabetes is reversible. If your blood sugar levels have crept into the prediabetes range (an A1C between 5.7% and 6.4%, or fasting blood sugar of 100 to 125 mg/dL), the most effective thing you can do is make targeted lifestyle changes. Losing even a modest amount of weight, moving more, and adjusting what you eat can bring your blood sugar back to normal and cut your risk of developing type 2 diabetes by more than half.
What Prediabetes Actually Means
Prediabetes means your blood sugar is higher than normal but hasn’t crossed the threshold into type 2 diabetes. Your body is becoming less responsive to insulin, the hormone that moves sugar from your blood into your cells for energy. Sugar starts building up in the bloodstream instead of being used efficiently.
This isn’t a permanent diagnosis. It’s a warning signal with a wide window for action. Many people return to normal blood sugar levels through the changes described below, and the earlier you start, the better the odds.
Lose a Small Amount of Weight
You don’t need a dramatic transformation. Losing just 7% of your body weight can reduce the risk of progressing to type 2 diabetes by more than half. For someone who weighs 200 pounds, that’s 14 pounds. For someone at 170 pounds, it’s about 12 pounds.
Even smaller losses help. Losing between 1% and 9% of your body weight improves how well insulin works to manage blood sugar. The goal isn’t reaching an ideal number on the scale. It’s moving the needle enough to change how your body handles glucose. Slow, steady weight loss through better eating and more movement is more sustainable than aggressive dieting, and the metabolic benefits start early.
Get 150 Minutes of Activity Per Week
Physical activity makes your cells more responsive to insulin, which is the core problem in prediabetes. It also builds muscle, and muscle tissue absorbs blood sugar during and after exercise. The target is 150 minutes of moderate-intensity activity per week. That breaks down to about 30 minutes on five days.
Moderate intensity means you’re working hard enough to raise your heart rate and break a sweat, but you can still carry on a conversation. Brisk walking, cycling, swimming, and yard work all count. You don’t need a gym membership. What matters is consistency. If 30 minutes feels like too much at first, two 15-minute walks accomplish the same thing. Adding resistance training (bodyweight exercises, resistance bands, or weights) a couple of times per week further improves insulin sensitivity by building the muscle that pulls sugar out of your blood.
Change What and How You Eat
Three dietary shifts make the biggest difference for prediabetes: cutting added sugars, swapping simple carbohydrates for complex ones, and eating more vegetables and fiber.
Simple carbs (white bread, white rice, sugary drinks, pastries) break down quickly and cause sharp spikes in blood sugar. Complex carbs (whole grains, beans, lentils, sweet potatoes) digest more slowly, producing a gradual rise instead. This gives your insulin more time to do its job. Vegetables, especially non-starchy ones like broccoli, leafy greens, peppers, and green beans, add bulk and nutrients without much impact on blood sugar.
Fiber deserves special attention. It slows digestion, blunts blood sugar spikes after meals, and increases insulin sensitivity. The recommended daily intake for adults is 22 to 34 grams depending on age and sex. Most people fall well short of that. Good sources include beans, lentils, oats, berries, nuts, seeds, and whole grain bread. Building up gradually helps avoid bloating.
You don’t need to follow a rigid meal plan. Focus on filling half your plate with vegetables, a quarter with a lean protein, and a quarter with a complex carb. Reducing sugary drinks, including fruit juice and sweetened coffee, often produces noticeable improvements on its own.
Prioritize Sleep
Sleep is an underappreciated factor in blood sugar control. Sleeping fewer than six hours a night is significantly associated with increased risk of prediabetes, diabetes, and metabolic problems. When you’re sleep-deprived, your body releases more of the stress hormone cortisol, ramps up inflammation, and your cells become less responsive to insulin. Every study examining the relationship has found that sleep deprivation reduces insulin sensitivity.
Adults should aim for at least seven hours per night. If you’re consistently getting less than that, improving your sleep may be one of the highest-impact changes you can make. Keeping a consistent bedtime, limiting screens before bed, and cutting caffeine after early afternoon are practical starting points.
When Medication Comes Into Play
Lifestyle changes are the first-line treatment for prediabetes, but some people benefit from medication as well. Metformin, a drug that helps the body use insulin more effectively, is sometimes prescribed alongside lifestyle changes. In clinical trials, it was most effective in people younger than 60, those with a BMI above 35, and women who had gestational diabetes during pregnancy.
Medication isn’t a substitute for the lifestyle changes above. It’s an additional tool for people at higher risk of progressing to type 2 diabetes. Your doctor can help determine whether it makes sense for your situation based on your age, weight, and other health factors.
How to Track Your Progress
Once you’ve been diagnosed with prediabetes, your blood sugar should be checked at least once a year. Your doctor will typically retest your A1C or fasting glucose to see whether your levels are improving, holding steady, or trending upward. If you’ve made significant changes and lost weight, it’s reasonable to ask for testing sooner to see where you stand.
The numbers you’re aiming for: an A1C below 5.7% or a fasting blood sugar under 100 mg/dL. Those thresholds mark a return to the normal range. Some people reach them within months of consistent lifestyle changes. Others take a year or longer. The pace matters less than the direction. Even if your numbers don’t fully normalize, keeping them in the prediabetes range rather than letting them climb into the diabetes range (A1C of 6.5% or higher, fasting glucose of 126 or above) is a meaningful outcome that protects your long-term health.
Pay attention to trends beyond blood sugar too. Improvements in energy, sleep quality, and how your clothes fit are early signals that your metabolism is shifting in the right direction, often before your next lab results confirm it.