Prediabetes is reversible. Most people who make sustained lifestyle changes can bring their blood sugar back into the normal range, and many maintain those results for years. But “curable” isn’t quite the right word. The medical community uses “remission” rather than “cure” because blood sugar can drift back up if the habits that lowered it don’t stick. The good news: the changes required are straightforward, well-studied, and effective even in modest doses.
Why Doctors Say Remission, Not Cure
Prediabetes means your A1C falls between 5.7% and 6.4%, a range where blood sugar is elevated but hasn’t crossed into diabetes territory. Returning that number to below 5.7% is entirely possible, and for many people, it happens within months of changing their diet and activity level.
The distinction between remission and cure matters, though. An international expert panel coordinated by the American Diabetes Association defined remission as an A1C below 6.5% sustained for at least three months without medication. That definition was written for type 2 diabetes, but the same logic applies to prediabetes: the underlying tendency toward insulin resistance doesn’t vanish. It goes quiet. If the conditions that triggered it return (weight regain, sedentary habits, poor sleep), blood sugar can climb again. That’s why yearly monitoring is recommended even after your numbers normalize.
None of this should be discouraging. It simply means prediabetes reversal is something you maintain, like fitness or healthy blood pressure, rather than something you fix once and forget.
How Much Weight Loss It Takes
The landmark Diabetes Prevention Program, one of the largest studies ever conducted on prediabetes, found that losing just 5% to 7% of body weight reduced the risk of progressing to type 2 diabetes by 58%. For people over 60, the reduction was even more dramatic: 71%. That’s a 180-pound person losing 9 to 13 pounds.
Research from the German Center for Diabetes Research adds a useful detail: where you lose the weight matters. In a 12-month lifestyle intervention, people who lost at least 5% of their body weight and reduced their waist circumference (roughly 4 cm for women, 7 cm for men) had the highest likelihood of remission. Abdominal fat is particularly disruptive to insulin signaling, so even small reductions around the midsection have outsized effects on blood sugar control.
The 15-year follow-up data from the Diabetes Prevention Program shows that benefits persist over time, though they do shrink. Participants still had a 27% lower incidence of type 2 diabetes a decade and a half later. That tapering is partly because some people regain weight, which reinforces the point: the lifestyle changes need to be ones you can sustain, not a crash diet you abandon after six months.
What to Eat
Two dietary patterns have the strongest evidence for improving insulin sensitivity: the Mediterranean diet and the DASH diet.
The Mediterranean approach emphasizes vegetables, fruits, whole grains, legumes, fish, olive oil, and nuts while limiting red meat and processed foods. In the large PREDIMED-Plus trial, a calorie-conscious version of this diet combined with moderate physical activity reduced the risk of developing type 2 diabetes by 31% in overweight adults with metabolic syndrome. Participants also saw reductions in fasting insulin, waist circumference, and body weight. Multiple meta-analyses confirm that Mediterranean-style eating consistently improves both A1C and insulin resistance, with effects that hold up over long-term follow-up. High fish consumption appears to be a particularly strong driver of those benefits.
The DASH diet, originally designed to lower blood pressure, overlaps significantly: plenty of vegetables, fruits, whole grains, lean protein, and low-fat dairy, with strict limits on sodium, saturated fat, and added sugars. Clinical trials have shown it reduces fasting insulin levels and improves insulin sensitivity, particularly when combined with modest calorie reduction.
The 2025 ADA Standards of Care reinforce these patterns, recommending that people with prediabetes follow evidence-based eating plans that incorporate plant-based protein and fiber, limit saturated fat, and replace sugary or artificially sweetened drinks with water. You don’t need to follow a named diet perfectly. The consistent thread across all the evidence is: more plants, more fiber, less processed food, less sugar.
How Much Exercise You Need
The target is 150 minutes per week of moderate-intensity activity. At moderate intensity, you can carry on a conversation but couldn’t sing along to a song. Brisk walking, cycling, swimming, and yard work all count.
Spacing matters more than most people realize. Your muscles actively pull sugar from your bloodstream during and after exercise, but that effect fades after about 48 hours. Going no more than two days between sessions keeps your muscles in a consistent state of increased glucose uptake, which is the primary mechanism through which exercise lowers blood sugar. Five to six days a week is ideal, but even three to four days makes a meaningful difference.
If carving out 30 minutes feels difficult, shorter sessions work too. Three 10-minute bouts of activity spread across the day deliver the same cardiovascular benefit as a single 30-minute block, as long as each session hits at least 10 minutes and stays at moderate intensity.
What Happens if Lifestyle Changes Aren’t Enough
For some people, genetics, age, or other metabolic factors make it harder to reach normal blood sugar through diet and exercise alone. Medications that improve insulin sensitivity or slow glucose absorption can help bridge the gap. Your doctor may also evaluate whether related conditions, like fatty liver disease, need separate attention. The 2025 ADA guidelines specifically address the overlap between prediabetes and liver disease, noting that certain newer medications originally developed for diabetes also benefit liver health when both conditions are present.
But medication is typically a complement to lifestyle changes, not a replacement. The Diabetes Prevention Program found that lifestyle intervention outperformed medication alone, and the combination tends to work best when the foundation of diet and movement is already in place.
Keeping Your Numbers Down Long-Term
The biggest predictor of lasting remission is whether the habits stick. That sounds obvious, but it shifts the practical question from “how do I reverse prediabetes?” to “how do I build a routine I won’t quit?” A few patterns emerge from the long-term data:
- Small, consistent weight management beats dramatic weight loss followed by regain. Maintaining a 5% loss is more protective than losing 15% and bouncing back.
- Regular movement you enjoy matters more than optimal exercise programming. Walking is the most commonly sustained form of activity in long-term studies for a reason.
- Annual A1C testing catches any upward drift early, when a small course correction (dropping a few pounds, adding a couple of walks per week) is enough to bring numbers back down.
Prediabetes is one of the most responsive conditions in medicine. The majority of people who take it seriously and make moderate, sustainable changes will see their blood sugar return to normal. It’s not a one-time fix, but the effort required to maintain it shrinks considerably once the new habits feel routine.