Prediabetes is manageable, and in many cases reversible, through a combination of dietary changes, regular physical activity, and weight loss. An A1C between 5.7% and 6.4% places you in the prediabetes range, meaning your blood sugar is elevated but hasn’t crossed the threshold of 6.5% that defines type 2 diabetes. The goal is to push that number back below 5.7%, and research shows that roughly 43% of people who commit to lifestyle changes achieve that within a few years.
Why Weight Loss Matters Most
If there’s one number to focus on, it’s losing 5% to 7% of your current body weight. That’s the target used in the landmark Diabetes Prevention Program, and it remains the cornerstone of every major guideline on prediabetes management. For someone weighing 200 pounds, that means losing 10 to 14 pounds. This doesn’t need to happen quickly. Gradual, sustained loss over several months is more effective and easier to maintain than a crash diet.
Even modest weight loss improves how your body responds to insulin, lowering both fasting blood sugar and the glucose spikes that follow meals. You don’t need to reach an “ideal” weight. The benefits start showing up well before that.
Reshaping What You Eat
There is no single perfect diet for prediabetes. The American Diabetes Association states that an ideal ratio of carbohydrates, fat, and protein doesn’t exist and should be tailored to your preferences and goals. That said, reducing your total carbohydrate intake consistently improves blood sugar control, and certain dietary patterns have strong evidence behind them.
The Mediterranean diet, which emphasizes vegetables, whole grains, legumes, fish, olive oil, and nuts, is one of the most well-supported options. The DASH diet (originally designed for blood pressure) and Nordic dietary patterns also show benefits. What these approaches share is a reliance on whole, minimally processed foods and healthy fats from plants rather than saturated or trans fats.
A reasonable macronutrient starting point is 45% to 60% of calories from carbohydrates, 15% to 20% from protein, and 20% to 35% from fat. But the quality of those carbohydrates matters as much as the quantity. Swapping white bread, sugary cereals, and refined grains for whole grains, beans, and vegetables makes a measurable difference in how sharply your blood sugar rises after eating. One important note: very low-carbohydrate ketogenic diets are not recommended as a long-term strategy for weight loss or blood sugar management in current guidelines.
Fiber Is a Powerful Tool
Fiber slows the absorption of sugar into your bloodstream, which flattens post-meal glucose spikes. A large meta-analysis found that people with prediabetes or diabetes who increased their daily fiber intake to 35 grams per day, or by at least 15 grams above their current intake, saw meaningful improvements in blood sugar and a reduced risk of premature death. Most adults eat around 15 grams of fiber daily, so hitting 35 grams means roughly doubling your intake. Beans, lentils, oats, berries, broccoli, and whole grain bread are practical ways to get there.
Cut Sugary Drinks
Liquid sugar is one of the fastest ways to spike blood glucose, and the research is striking. A meta-analysis of large studies found that drinking one or more sugar-sweetened beverages per day is associated with a 30% higher risk of developing type 2 diabetes compared to drinking little or none. This includes sodas, sweetened teas, fruit punches, and energy drinks. Replacing them with water, unsweetened tea, or black coffee is one of the simplest high-impact changes you can make.
How to Structure Your Exercise
Physical activity improves insulin sensitivity directly, independent of weight loss. Current guidelines recommend moderate-intensity aerobic exercise as the primary form, supplemented by resistance training when possible. Most studies showing benefit used sessions at least three times per week, with many lasting 12 weeks or longer before outcomes were measured.
In practical terms, this means activities like brisk walking, cycling, swimming, or dancing for 150 minutes per week, spread across at least three days. Adding two sessions of resistance training (bodyweight exercises, resistance bands, or weights) each week helps your muscles absorb glucose more efficiently. You don’t need a gym membership. Walking after meals, even for 10 to 15 minutes, has a noticeable effect on post-meal blood sugar levels.
The key is consistency. A 12-week commitment is the minimum timeframe where most studies begin to show measurable changes in blood sugar markers.
Sleep and Stress Affect Blood Sugar Directly
Poor sleep doesn’t just make you tired. It actively impairs how your body handles glucose. Studies on healthy volunteers show that sleep deprivation, even short-term, decreases insulin sensitivity and raises cortisol levels, particularly in the evening. Both of these push blood sugar higher. People who regularly sleep fewer than seven hours or more than eight have an elevated risk of developing diabetes compared to those sleeping seven to eight hours per night.
Chronic stress works through a similar pathway. Elevated cortisol keeps your liver releasing glucose into the bloodstream even when you don’t need it. While you can’t eliminate stress entirely, regular physical activity, consistent sleep schedules, and basic relaxation practices (deep breathing, time outdoors) help keep cortisol in check. Think of sleep and stress management not as bonus lifestyle tips but as direct blood sugar interventions.
When Medication Enters the Picture
Lifestyle changes are the first-line treatment for prediabetes, but some people may also benefit from medication. Metformin, the most commonly discussed option, has been shown to be particularly effective for people under 60 with a BMI of 35 or higher, those with a fasting glucose above 110 mg/dL or an A1C at 6.0% or above, and women with a history of gestational diabetes. If you fall into one of these categories and lifestyle changes alone aren’t moving your numbers, it’s a conversation worth having with your doctor. Metformin works by reducing the amount of glucose your liver produces and improving your body’s response to insulin.
Tracking Your Progress
Once you’ve been diagnosed with prediabetes, the standard recommendation is to retest your A1C once per year. This gives enough time for lifestyle changes to show up in your results, since A1C reflects your average blood sugar over the previous two to three months. Some providers may test more frequently if you’re making significant changes and want to see whether they’re working.
A five-year study tracking people with prediabetes who adopted lifestyle interventions found that about 43% reversed to normal glucose levels, 50% remained in the prediabetes range without worsening, and only about 7% progressed to type 2 diabetes. Those are encouraging numbers. The study also found that how long someone had prediabetes before starting didn’t significantly affect their ability to reverse it, meaning it’s not too late to start regardless of when you were diagnosed.
Putting It All Together
Managing prediabetes comes down to a handful of changes, applied consistently. Lose 5% to 7% of your body weight. Move your body at moderate intensity for at least 150 minutes a week, ideally with some resistance training mixed in. Build meals around vegetables, whole grains, legumes, and healthy fats while cutting back on refined carbohydrates and sugary drinks. Aim for 35 grams of fiber daily. Sleep seven to eight hours a night. Retest your A1C annually to track where you stand.
None of these changes need to happen all at once. Start with the one or two that feel most achievable and build from there. The evidence is clear that prediabetes responds well to sustained, moderate effort, and for nearly half of people who commit to these changes, normal blood sugar levels are a realistic outcome.