Prediabetes is reversible. Losing about 7% of your body weight and exercising 150 minutes per week lowers your risk of developing type 2 diabetes by 58%. For someone weighing 200 pounds, that’s roughly 15 pounds. These numbers come from the Diabetes Prevention Program, one of the largest and longest-running studies on the topic, which tracked participants for nearly two decades.
Prediabetes means your blood sugar is elevated but hasn’t crossed into diabetes territory. Your A1C falls between 5.7% and 6.4%, or your fasting blood glucose sits between 100 and 125 mg/dL. The good news: at this stage, the process can be stopped and often reversed entirely, bringing blood sugar back into the normal range.
Why Weight Loss Works
Your muscles are responsible for clearing about 80% of the glucose from your bloodstream under normal conditions. When you carry excess weight, your cells become less responsive to insulin, the hormone that signals them to absorb that glucose. The result is sugar building up in your blood while your pancreas works overtime to compensate.
Losing weight, even a modest amount, relieves that metabolic pressure. Your cells start responding to insulin again, and your pancreas no longer has to produce excessive amounts of it. The combination of dietary changes and physical activity is particularly powerful because it protects the insulin-producing cells in your pancreas from burning out. Once those cells lose function, the path to type 2 diabetes becomes much harder to reverse. Catching things at the prediabetes stage means those cells are still largely intact and recoverable.
You don’t need to hit your ideal body weight. Losing 10 to 15 pounds makes a measurable difference in blood sugar control, and for adults over 60, the results are even more dramatic. The Diabetes Prevention Program found that participants 60 and older reduced their risk of type 2 diabetes by 71%.
What to Eat
The Mediterranean diet is widely considered the best eating pattern for prediabetes, with its emphasis on whole grains, lean protein, healthy fats, and plenty of vegetables. You don’t need to follow a rigid meal plan, but a simple plate method works well: fill half your plate with nonstarchy vegetables like leafy greens, one quarter with whole grains such as brown rice, farro, or quinoa, and one quarter with lean protein like chicken, fish, or tofu.
Fiber is one of the most important nutrients for blood sugar control. It slows digestion and prevents the sharp blood sugar spikes that come from refined carbohydrates. Aim for 25 to 30 grams of fiber per day from a variety of sources: fruits, vegetables, whole grains, and legumes. When choosing cereals or packaged foods, look for at least five grams of fiber per serving.
The carbohydrates you cut matter more than cutting carbohydrates entirely. White bread, white rice, and white pasta cause rapid blood sugar spikes because they’ve been stripped of fiber and nutrients. Swapping these for whole-grain versions makes a significant difference without requiring you to eliminate an entire food group. Portion size also matters. You can eat brown rice and still see blood sugar climb if you’re eating two cups of it at a sitting.
How Much Exercise You Need
The target is 150 minutes of moderate-intensity physical activity per week, which breaks down to about 30 minutes on most days. Brisk walking counts. So does cycling, swimming, or anything that gets your heart rate up enough that you can talk but not sing.
Exercise does more than burn calories. When your muscles contract, they release signaling molecules that directly improve how your pancreas functions and how well your cells respond to insulin. Physical activity also helps preserve and build muscle mass, which matters because muscle tissue is where most of your blood sugar gets absorbed. Losing muscle, whether through inactivity or aging, impairs your body’s ability to regulate glucose and increases insulin resistance.
Resistance training (weight lifting, bodyweight exercises, resistance bands) deserves a spot in your routine for exactly this reason. Building or maintaining muscle gives your body more capacity to clear sugar from the bloodstream. Combining aerobic exercise with resistance training is more effective than either one alone.
Sleep Changes Blood Sugar More Than You Think
Sleeping fewer than six hours per night is independently associated with higher fasting glucose levels, greater insulin resistance, and increased risk of prediabetes progressing to diabetes. Adults need a minimum of seven hours per night.
The connection isn’t just about feeling tired and making worse food choices, though that plays a role. Sleep deprivation raises cortisol, your body’s primary stress hormone, by roughly 20 to 23% during the afternoon and evening hours. Elevated cortisol directly increases blood sugar by triggering your liver to release more glucose. It also makes your cells more resistant to insulin.
Research has shown that people who successfully extended their sleep beyond six hours saw measurable improvements in fasting insulin resistance, increased insulin secretion, and better function of their insulin-producing cells. If you’re doing everything else right but sleeping poorly, your blood sugar numbers may not budge. Prioritizing consistent, adequate sleep is a legitimate part of reversing prediabetes, not a secondary concern.
When Medication Enters the Picture
Lifestyle changes are the first-line approach, but medication may be recommended alongside them for people at higher risk. Specifically, medication tends to be most effective for adults younger than 60 with a BMI over 35, and for women who had gestational diabetes during pregnancy. For these groups, the combination of medication and lifestyle changes provides stronger protection than either strategy alone.
For most people with prediabetes, though, the lifestyle approach is both more effective and more sustainable than medication. The 58% risk reduction from weight loss and exercise exceeded the results seen with medication in the Diabetes Prevention Program.
Tracking Your Progress
Once you start making changes, your A1C test is the clearest measure of whether they’re working. A1C reflects your average blood sugar over the previous two to three months, so it captures the cumulative effect of your new habits rather than daily fluctuations. If your numbers are moving in the right direction, testing every six months is typically sufficient. If you’ve recently changed your approach or aren’t meeting your goals, testing every three months gives you faster feedback.
The target is straightforward: get your A1C below 5.7% and your fasting glucose below 100 mg/dL. Many people achieve this within a year of sustained lifestyle changes. The key word is sustained. Prediabetes can return if the habits that reversed it don’t stick. The same weight loss and activity levels that brought your numbers down are what keep them there.