If you’ve been told you’re prediabetic, the single most important thing to know is that this is reversible. About 43% of people with prediabetes who make lifestyle changes return to normal blood sugar levels within five years. Another 50% stay in the prediabetes range without getting worse, and only about 7% progress to type 2 diabetes. Those are encouraging numbers, and they put real control in your hands.
Prediabetes means your A1C falls between 5.7% and 6.4% (normal is below 5.7%, and 6.5% or above is diabetes). Without intervention, roughly 4 out of every 100 people with prediabetes develop type 2 diabetes each year. The steps below are what actually move the needle.
Lose 5 to 7 Percent of Your Body Weight
This is the most well-studied intervention for prediabetes, and the target is surprisingly modest. The Diabetes Prevention Program, a landmark trial that shaped current guidelines, found that losing just 5 to 7% of your body weight dramatically cuts your risk of progressing to diabetes. For someone who weighs 200 pounds, that’s 10 to 14 pounds. For someone at 160 pounds, it’s 8 to 11 pounds.
The goal is to hit that target within the first six months and then maintain it. You don’t need to reach an “ideal” weight. Even partial weight loss improves how your body responds to insulin, lowers your fasting blood sugar, and reduces fat stored around your organs. The method matters less than the result, so pick an approach you can sustain for years, not weeks.
Change What You Eat
Two dietary patterns have the strongest evidence for prediabetes: lower-carbohydrate eating and the DASH diet (originally designed for blood pressure but effective for blood sugar too). In a head-to-head trial published in the Annals of Family Medicine, a very low-carbohydrate diet lowered A1C by 0.35% over four months, compared to 0.14% for DASH. Both helped, but cutting carbs had a bigger effect on blood sugar specifically.
You don’t need to go extremely low-carb to benefit. The core principle is reducing refined carbohydrates (white bread, sugary drinks, pastries, white rice) and replacing them with vegetables, protein, healthy fats, and fiber-rich whole grains. Fiber is particularly important. The CDC recommends 22 to 34 grams per day depending on your age and sex, and most Americans fall well short of that. Insoluble fiber, found in whole grains, nuts, and vegetables, directly increases insulin sensitivity.
A practical starting point: build your plate around a palm-sized portion of protein, fill half the plate with non-starchy vegetables, and use a small portion of whole grains or starchy vegetables for the remainder. This approach naturally reduces carbs without requiring you to count anything.
Get 150 Minutes of Activity Per Week
The CDC recommends at least 150 minutes of moderate-intensity physical activity per week. That breaks down to about 30 minutes on five days. “Moderate intensity” means you can talk but not sing during the activity: brisk walking, cycling, swimming, or even vigorous yard work all count.
Exercise works on prediabetes through a mechanism that’s separate from weight loss. When your muscles contract, they pull sugar out of your bloodstream for energy, and this effect lasts for hours after you stop. Regular activity also makes your cells more responsive to insulin over time, which is the core problem in prediabetes. You’ll get benefits even on days when the scale doesn’t move.
Resistance training (bodyweight exercises, weight machines, free weights, resistance bands) adds another layer. Building muscle increases the amount of tissue in your body that actively absorbs blood sugar. If you’re new to exercise, starting with two or three short walks per day and adding resistance work once or twice a week is a realistic first step.
Prioritize Sleep
Short sleep is independently linked to insulin resistance, even in people who eat well and exercise. The connection is biological, not just behavioral. Sleep deprivation raises inflammatory markers in the blood that interfere with how your cells respond to insulin. It also disrupts hormones that regulate blood sugar, including one called GLP-1 that helps your body process glucose after meals.
One particularly striking finding: after just two nights of restricted sleep, fat cells start handling fatty acids abnormally in ways that promote insulin resistance. And two nights of “catch-up” sleep weren’t enough to restore normal glucose control. This suggests that consistently short sleep does cumulative damage that weekend sleep-ins can’t fully repair.
Aim for seven to eight hours per night. If you snore heavily or wake up feeling unrested despite enough time in bed, it’s worth being evaluated for sleep apnea, which has its own direct effect on blood sugar regulation.
Know When Medication Enters the Picture
Lifestyle changes are the first-line treatment for prediabetes, but some people are also candidates for metformin, a medication that reduces the amount of sugar your liver releases into your bloodstream. Current guidelines suggest considering it if you have both elevated fasting blood sugar and abnormal glucose tolerance, plus at least one additional risk factor: a BMI of 35 or higher, a first-degree relative with diabetes, high triglycerides, low HDL cholesterol, or an A1C above 6.0%.
Metformin isn’t a substitute for lifestyle changes. It works best alongside them. If your doctor prescribes it, you’ll still benefit from every dietary and exercise improvement you make, and the combination is more effective than either approach alone.
Track Your Progress
The A1C test is the simplest way to measure whether your efforts are working. It reflects your average blood sugar over the previous two to three months, so it captures the big picture rather than day-to-day fluctuations. If you have diabetes, guidelines recommend testing A1C at least twice a year. For prediabetes, your doctor will set a testing schedule based on your risk level, but every three to six months is common during the first year of lifestyle changes.
You generally don’t need a home glucose monitor for prediabetes unless your doctor specifically recommends one. The more useful numbers to track at home are your weight (weekly, same day and time) and your activity minutes. These are the inputs you can control, and they predict where your A1C will land at your next check.
What Realistic Progress Looks Like
Reversal doesn’t happen overnight. In the most detailed study tracking prediabetes outcomes, participants who made lifestyle changes were followed for an average of about 3.4 years. By the five-year mark, 43% had returned to normal blood sugar, 50% remained prediabetic but stable, and only 7% had progressed to type 2 diabetes. Previous studies have reported reversal rates ranging from 30% to 50%, depending on the population and how aggressively people changed their habits.
The people most likely to reverse prediabetes are those who start early. In one study, 93% of participants who began lifestyle changes within the first several years of their prediabetes diagnosis avoided progressing to type 2 diabetes. The longer prediabetes persists without intervention, the harder it becomes to reverse, which makes acting now, even in small ways, more valuable than waiting for the “perfect” plan.