If you have prediabetes, you can eat a wide variety of foods. The goal isn’t to eliminate entire food groups but to shift the balance of your plate toward vegetables, lean proteins, healthy fats, and high-fiber carbohydrates while cutting back on added sugars and refined starches. A well-chosen diet can slow or even reverse the progression from prediabetes to type 2 diabetes.
The Plate Method: A Simple Starting Point
The easiest way to build a prediabetes-friendly meal is the plate method recommended by the CDC. Start with a 9-inch dinner plate (about the length of a business envelope) and divide it into sections:
- Half the plate: non-starchy vegetables like salad greens, broccoli, green beans, peppers, tomatoes, or cauliflower
- One quarter: lean protein such as chicken, turkey, fish, tofu, beans, or eggs
- One quarter: carbohydrate foods like brown rice, whole-grain bread, sweet potato, or fruit
This ratio keeps your portions of blood-sugar-raising carbohydrates in check without requiring you to count every gram. It also naturally fills you up with fiber and protein first, so you’re less likely to overeat the starchier portion of your meal.
Best Vegetables and Fruits
Non-starchy vegetables are essentially unlimited. Leafy greens, zucchini, asparagus, mushrooms, cabbage, cucumbers, and bell peppers are all low in carbohydrates and packed with nutrients. Roast them, stir-fry them in a small amount of olive oil, or eat them raw with hummus.
Fruit is fine, but portion size matters. A piece of whole fruit like an apple, a small banana, or a cup of berries contains fiber that slows sugar absorption, making it a much better choice than fruit juice or dried fruit, which concentrate the sugar. Even watermelon, often assumed to be too sugary, has a low glycemic load of about 8 per serving, meaning it releases sugar into your bloodstream gradually when eaten in normal amounts. The concept of glycemic load accounts for both the type and quantity of carbohydrate in a serving, and foods scoring 10 or below are considered low.
Carbohydrates That Work for You
You don’t need to cut carbs entirely. The key is choosing carbohydrates that come with fiber, which slows digestion and prevents sharp blood sugar spikes. Good options include oats, quinoa, barley, whole-wheat pasta, brown rice, sweet potatoes, lentils, chickpeas, and black beans. White bread, white rice, and sugary cereals break down quickly and push blood sugar higher, so swap them for whole-grain versions when you can.
The current Dietary Guidelines recommend 22 to 34 grams of fiber per day depending on your age and sex. Most Americans fall well short of that. Insoluble fiber, found in whole grains, nuts, and vegetable skins, is particularly helpful because it increases insulin sensitivity, meaning your body needs less insulin to move sugar out of your blood. Soluble fiber, found in oats, beans, and apples, forms a gel during digestion that slows sugar absorption. Both types matter, so eating a variety of whole plant foods covers your bases.
Lean Proteins to Prioritize
Protein has minimal direct effect on blood sugar, and pairing it with carbohydrates slows glucose absorption. Aim for a palm-sized portion (roughly one quarter of your plate) at each meal. Chicken breast, turkey, fish, shellfish, tofu, tempeh, eggs, and legumes are all strong choices. Fish like salmon, sardines, and mackerel offer the added benefit of omega-3 fatty acids, which support heart health.
Limit processed meats like bacon, sausage, and deli meat. They’re high in saturated fat and sodium, both of which raise cardiovascular risk, and prediabetes already puts extra strain on your heart. When you eat red meat, choose lean cuts and keep portions moderate.
Fats That Help, Fats That Don’t
Fat doesn’t raise blood sugar directly, but the type of fat you eat matters for insulin resistance and heart health. Monounsaturated fats, found in olive oil, avocado, and most nuts, are your best options. Use olive oil or rapeseed (canola) oil for cooking instead of butter, lard, or coconut oil. A handful of almonds, walnuts, or peanuts makes a satisfying snack that won’t spike your blood sugar.
Saturated fat, concentrated in fatty cuts of meat, full-fat cheese, cream, and fried foods, increases your risk of heart disease. The 2025 Standards of Care in Diabetes specifically recommend limiting saturated fat intake. That doesn’t mean you can never have cheese, but treating it as a topping rather than a main course helps keep portions reasonable.
What to Drink
Water is the simplest and best choice. The latest diabetes care guidelines recommend drinking water instead of beverages with added sugar or calorie-free sweeteners. Sugary drinks like soda, sweet tea, juice, and flavored coffee drinks are among the fastest ways to spike blood sugar because they deliver large amounts of sugar with no fiber to slow absorption.
Artificial sweeteners like aspartame and sucralose don’t directly affect blood sugar, but recent research suggests they may not be as beneficial as once thought, particularly for people who consume them frequently. Sugar alcohols (xylitol, sorbitol, erythritol) are a separate category: they contain about half the calories of sugar but can raise blood sugar to some degree and cause digestive issues in some people. Unsweetened coffee and tea are both fine in moderation.
Alcohol
If you drink, moderation means one drink per day for women and up to two for men. A “drink” is smaller than many people realize: five ounces of wine, 12 ounces of beer, or one and a half ounces of spirits. Wine and spirits are nearly carbohydrate-free (a glass of wine has roughly four grams of carbs), while beer and cocktails mixed with juice or soda carry significantly more. Avoid drinking on an empty stomach, as alcohol can cause unpredictable blood sugar drops.
Reading Labels for Hidden Sugars
Packaged foods often contain added sugars under names you might not recognize. The CDC flags several to watch for on ingredient lists: cane sugar, turbinado sugar, corn syrup, high-fructose corn syrup, rice syrup, molasses, caramel, honey, agave, and juice concentrates. As a general rule, any ingredient ending in “-ose” (glucose, fructose, maltose, dextrose, sucrose) is a form of sugar. Descriptions like “glazed,” “candied,” “caramelized,” or “frosted” also signal added sugar during processing.
Check the Nutrition Facts panel for “Added Sugars” specifically. Foods marketed as “healthy,” such as granola bars, flavored yogurt, and bottled smoothies, can contain as much added sugar as a candy bar. Plain Greek yogurt with fresh berries gives you the same satisfaction with a fraction of the sugar.
Meal Timing and Spacing
When you eat can matter nearly as much as what you eat. Research from Harvard-affiliated scientists found that eating dinner late at night, close to bedtime, leads to significantly higher blood sugar levels. The reason: your body’s melatonin levels rise in the evening to prepare for sleep, and elevated melatonin impairs insulin secretion. When you eat carbohydrates while melatonin is high, your body struggles to clear the resulting blood sugar efficiently. In the study, melatonin levels were 3.5 times higher after a late dinner compared to an earlier one.
A practical rule is to finish eating at least two hours before you go to bed. Spacing meals throughout the day, rather than skipping meals and then eating a large dinner, also helps prevent the sharp blood sugar swings that strain your system over time. If you get hungry between meals, reach for a small snack that combines protein or fat with a modest amount of carbohydrate: a few crackers with peanut butter, a handful of nuts, or vegetables with hummus.
Putting It All Together
A day of eating with prediabetes might look like this: oatmeal topped with berries and walnuts for breakfast, a large salad with grilled chicken, chickpeas, olive oil dressing, and a whole-grain roll for lunch, and baked salmon with roasted broccoli and a small serving of quinoa for dinner. Snacks could be an apple with almond butter or a small container of plain yogurt. None of that requires specialty foods or dramatic sacrifice.
The 2025 diabetes care standards emphasize following an eating pattern that includes a wide variety of healthy foods, with particular attention to plant-based protein and fiber. You don’t need to follow one rigid diet. Mediterranean, DASH, and plant-forward eating patterns all align well with prediabetes management. The common thread is more whole plants, lean proteins, and healthy fats, with less refined sugar, white flour, and saturated fat. Small, consistent shifts in this direction lower blood sugar, improve insulin sensitivity, and reduce the likelihood that prediabetes becomes type 2 diabetes.