What to Eat If You Are Prediabetic

Prediabetes is a condition where blood sugar levels are higher than normal but not high enough to be classified as type 2 diabetes. According to the CDC, over 98 million adults in the US have prediabetes, and most don’t even know it. A 2025 analysis found that people with prediabetes have a 21% to 76% greater risk of progressing to type 2 diabetes, depending on their individual risk factors.

One of the most effective tools for managing prediabetes is a healthy diet. Unlike medications, your daily food choices are entirely within your control. Without changes in diet or lifestyle, many people with prediabetes develop type 2 diabetes within five years.

This guide, grounded in scientific research and expert recommendations, explains exactly what to eat if you are prediabetic to help lower your risk and take back control of your health.

What To Eat If You Are Prediabetic

Below is a list of foods to reverse prediabetes.

1. Beta-glucan-rich grains (Oats and barley)

Beta-glucans are a type of soluble fiber that slows carbohydrate digestion and absorption, leading to steadier post-meal blood sugar levels. They are also fermented in the gut, producing short-chain fatty acids (SCFAs) that trigger the release of GLP-1 and PYY. These hormones boost insulin release and help you feel full, similar to how diabetic drugs like Ozempic and Mounjaro work.

Oats and barley are the richest sources of beta-glucan and among the best foods to eat for prediabetes.

In a controlled trial, results showed that eating 5 g of oat beta-glucan daily for 12 weeks helped lower blood sugar, improve insulin sensitivity, and increase fullness in people with type 2 diabetes.

Another review of 103 high-quality studies also found that adding oat beta-glucan (concentrate or oat-bran) to meals caused:

• • 23% lower total blood sugar rise
  • 28% lower peak blood sugar
  • 22% lower total insulin rise
  • 24% lower peak insulin

Like oats, barley’s effects on blood sugar have also been documented in several studies. One study included prediabetic postmenopausal women and gave one group 60 g of barley savigh every day (20 g before each meal). After 4 weeks, the barley group had 4.6% lower fasting blood sugar than the control group. They also had lower post-meal blood sugar, 11.2% lower after 2 weeks and 10.8% lower after 4 weeks.

Choose minimally processed oat or barley products to get the best functional effects from beta-glucans. For oats, examples include:

• • Steel-cut oats
  • Rolled oats
  • Oat bran

Be cautious with instant oats or those used in supplements or fortified foods, as they tend to have a lower molecular weight and less impact on blood sugar.

For barley, look for “whole” or “hulled” barley on the ingredient list. If it just says “pearled barley,” you’re likely getting a product with lower fiber and fewer metabolic benefits.

Alternative: If you’re avoiding oats or barley (e.g. due to gluten cross-contamination or intolerance), try quinoa, buckwheat, sorghum, maize, millet, or brown rice as alternative whole grains. These gluten-free options are also high in fiber and nutrients, but contain much less beta-glucan.

If you want beta-glucan-like effects, you can add chia seeds or flaxseeds (rich in mucilage, a gel-forming soluble fiber) or mix in psyllium husk for added viscosity.

2. Legumes (Beans, lentils, chickpeas)

Legumes are among the lowest glycemic index carb sources, making them a great choice for a prediabetic diet. Research has shown that incorporating legumes into the diet improves long-term glycemic control.

In a 16-week randomized trial among people with prediabetes, a calorie-controlled diet with 100?g of cooked legumes per meal led to a greater reduction in HbA1c compared to a similar diet without legumes. Similarly, a 3-month trial in type 2 diabetics found that a low-glycemic index (low-GI) diet emphasizing legumes (targeting one cup daily) lowered HbA1c by an extra ~0.2% compared to a high-fiber whole-grain diet without legumes.

You can add legumes to your diet by swapping them in for refined carbs or meats in everyday meals. For example, use lentils instead of white rice or pasta in grain bowls, or add black beans to tacos, soups, or stews. Toss chickpeas into salads, stir-fries, or roasted vegetable dishes for extra fiber and protein.

Snack-wise, hummus with veggie sticks, roasted chickpeas, or a chickpea spread on toast are quick ways to boost your intake. You can also try legume-based products like chickpea pasta or lentil chips.

3. Nuts (Almonds, walnuts, etc.)

Nuts are low in carbohydrates but rich in healthy fats, protein, and fiber, which is an ideal combination for slowing glucose release into the bloodstream.

A systematic review of 12 trials in individuals with type 2 diabetes found that diets incorporating tree nuts (56 g per day) resulted in 0.07% reductions in HbA1c and 0.15 mmol/L lower fasting glucose levels compared to control diets.

Although these improvements are relatively small, they indicate better overall blood sugar management.

Another analysis reported that pistachio consumption enhanced fasting blood sugar levels and insulin sensitivity. Similarly, a study on almond-based diets showed reductions in HbA1c along with lower body mass index (BMI), suggesting broader metabolic benefits.

You can have nuts in your diet as a daily snack or mix them into meals. Sprinkle chopped almonds, walnuts, or pistachios over oatmeal, yogurt, salads, or roasted vegetables for added crunch and nutrients. Use natural nut butters on whole grain toast or fruit slices, or stir them into smoothies and oatmeal. You can also cook with nuts by adding them to stir-fries or using ground nuts as a crust for meats or in baking. Stick to unsalted, raw, or dry-roasted options to keep it heart-healthy.

Alternative: If you have nut allergies, seeds are a great substitute. Options like sunflower seeds, pumpkin seeds, or flax and chia seeds provide comparable healthy fats, protein, and fiber.

4. Berries (Blueberries, strawberries, etc.)

Berries are among the most blood-sugar-friendly fruits. They have relatively low natural sugar content, are high in fiber, and are packed with polyphenols (antioxidants) that may slow down the digestion or absorption of sugar.

A study in healthy adults showed that eating a polyphenol-rich berry puree (made from bilberries, blackcurrants, cranberries, and strawberries) delayed and reduced the rise in blood sugar levels after eating a meal high in sugar. Blood glucose peaked 1.0 mmol/L lower and 15 minutes later (at 45 minutes instead of 30) compared to the same meal without berries.

A separate trial involving obese, insulin-resistant individuals (but not diabetic) tested the effects of blueberry smoothies. Participants who drank them twice a day for 6 weeks improved their insulin sensitivity by an average of 1.7 mg/kg/min, as measured by the gold-standard hyperinsulinemic-euglycemic clamp. Those in the placebo group improved by only 0.4 mg/kg/min.

Enjoying a cup of berries as a snack or dessert, or mixing berries into oatmeal or yogurt, can satisfy a sweet tooth while supporting nutrition for prediabetes.

5. Green leafy, cruciferous, and yellow/orange/red vegetables

Eating a variety of vegetables is widely recommended as part of a healthy diet. They’re known to help lower the risk of chronic diseases like heart disease, stroke, certain cancers, and type 2 diabetes.

Leafy greens are extremely low in carbohydrates and calories, yet rich in magnesium, folate, and fiber. Red-colored vegetables contain health-promoting compounds that can protect the body from damage caused by oxidative stress, including phenolic compounds, flavonoids, and carotenoids.

Cruciferous veggies are very low in digestible carbs, high in fiber, and contain unique phytochemicals like sulforaphane that may directly improve metabolic health. Broccoli sprouts (young broccoli plants), in particular, are an exceptionally rich source of sulforaphane.

Clinical studies have explored their effects.

In a 12-week trial with prediabetic individuals, the fasting glucose levels of the broccoli sprout group decreased by approximately 0.2 mmol/L more than those of the control group. A stronger response, around a 0.4 mmol/L drop, was observed in certain subgroups, including those with mild obesity, low insulin resistance, or reduced insulin production.

An analysis of over 8,000 adults found that those who ate the most vegetables had better blood sugar control after meals. Green leafy vegetables were tied to lower insulin levels and improved insulin function. Eating cruciferous vegetables was linked to a 25% lower risk of developing type 2 diabetes over 12 years.

To add, a meta-analysis in 2015 also found that people who ate more of the following had a lower risk of developing type 2 diabetes:

• • Green leafy vegetables – 13% lower risk
  • Yellow vegetables – 28% lower risk
  • Cruciferous vegetables – 18% lower risk
  • Vegetable fiber – 13% lower risk

When adding them into your diet, aim for variety and pay attention to preparation. Go for whole, steamed, roasted, raw, or lightly sautéed. Avoid frying or adding sugary sauces.

Here’s a table of widely available vegetables in the US:

6. Whole fruits (Especially apples and pears)

Whole fruits, as opposed to fruit juice, are associated with better blood sugar control and lower diabetes risk.

Apples are a prime example of a whole fruit beneficial for prediabetes. They contain soluble fiber (pectin) in their flesh and peel, which slows the release of sugars. They also provide polyphenols like quercetin, which may improve insulin sensitivity.

A large analysis of three cohort studies (over 187,000 participants) found that eating at least two servings per week of blueberries, grapes, or apples was associated with up to a 23% reduction in diabetes risk compared to eating these fruits less than once per month. Meanwhile, greater fruit juice intake was linked to higher diabetes risk, likely because juicing removes fiber and causes more rapid blood sugar spikes.

Alternative: If you have Oral Allergy Syndrome (OAS), also called Pollen-Food Allergy Syndrome (PFAS), you might notice an itchy or tingling sensation in your mouth or throat after eating apples. This happens because proteins in apples can cross-react with certain pollen types, especially birch pollen.

In that case, try switching to pears, which offer similar nutritional benefits and were also included in the study mentioned above. You can also go for citrus fruits like oranges or grapefruits, just be sure they’re not restricted by any medications you take.

7. Yogurt (Fermented dairy)

Yogurt, particularly unsweetened, live-culture yogurt, is another food option to help with prediabetes. Plain yogurt has a low glycemic index due to its protein and fat content, and can influence gut health and metabolism.

In one large Harvard-led analysis, eating a serving of yogurt every day was linked to an 18% lower risk of developing type 2 diabetes.

It’s hypothesized that probiotics in yogurt improve insulin sensitivity or reduce inflammation in the body. While more research is needed to confirm cause-and-effect, the evidence suggests that regularly including plain yogurt (or kefir) as part of a balanced diet is favorable for glycemic control.

From a practical standpoint, yogurt can be a satisfying snack or breakfast, especially when topped with berries and flaxseed. It provides protein and healthy bacteria without causing blood sugar spikes, as long as you choose varieties with no added sugar.

Alternative: If you can’t have dairy, probiotic-rich plant-based yogurts are a great alternative. Look for options made from soy, coconut, or almond milk that contain live active cultures to get similar benefits. You can also include other fermented foods like dairy-free kefir, kombucha, or sauerkraut to add beneficial probiotics to your diet. While these may support metabolic health, yogurt still has the strongest evidence when it comes to diabetes prevention.

8. Flaxseeds and other seeds

Flaxseeds are extremely high in soluble fiber and mucilage (gel-forming fiber), as well as alpha-linolenic acid (an omega-3 fatty acid) and lignans. When ground flaxseed is consumed, it forms a viscous gel in the gut that slows carbohydrate absorption and can blunt postprandial glucose spikes.

A 2023 systematic review and meta-analysis found that flaxseed supplementation significantly reduced HbA1c in patients with type 2 diabetes, especially in those whose blood sugar was not well-controlled.

You can try adding 1-2 tablespoons of ground flaxseed to daily foods like smoothies, oatmeal, yogurt, or baked into muffins to enhance fiber content and help regulate blood sugar throughout the day.

Recommended Diet For Prediabetes (Prediabetic Menu)

Here’s a 7-day prediabetic-friendly meal plan. Each day includes meals with blood sugar-stabilizing benefits backed by research.

DAY 1

DAY 3

Practical Tips to Maintain a Healthy Eating Routine

Changing your diet doesn’t need to be overwhelming. Here are strategies that help:

• • Use the plate method. Fill half with vegetables, one-quarter with lean protein, and one-quarter with whole grains or starchy vegetables.
  • Read labels. Watch for added sugars, sodium, and refined carbs.
  • Meal prep. Planning ahead makes healthy choices easier during busy weeks.
  • Cook more at home. You’ll have better control over ingredients and portions.
  • Stay hydrated. Drinking water regularly helps with satiety and blood sugar balance.
  • Use a food tracker. Tools like MyFitnessPal or a blood glucose log can offer insights into how meals affect you.

Summary

Being diagnosed with prediabetes can feel intimidating, but you can still take control of your health before things progress. The foods you eat daily can help restore balance, improve energy, and keep your blood sugar in check.

Prioritize non-starchy vegetables, whole grains, proteins, and healthy fats, and cut back on processed and sugary foods. Combine these changes with regular physical activity, stress management, and sleep hygiene, and you’ll be taking proactive steps toward preventing type 2 diabetes.

Remember, small changes over time lead to sustainable success.

Frequently Asked Questions