Prediabetes Diet

From hopkinsmedicine.org

If your doctor says your bloodwork reveals prediabetes, you’re bound to have questions about what’s best to eat. People with prediabetes have fasting blood sugar levels that are elevated, but not to the point that they meet the criteria of type 2 diabetes.  

Key Points

• Prediabetes can often be reversed through lifestyle changes like healthier eating. Increased physical activity, with a goal of 5% to 7% weight loss.
• A balanced, sustained eating approach — not restrictive diets — is essential for managing prediabetes.
• The Mediterranean diet is recommended because it focuses on whole grains, lean proteins, and healthy fats.
• Reducing added sugars and saturated fats and choosing high‑fiber foods support healthier blood sugar levels.

Diet for Prediabetes — What foods should I eat?

A balanced diet is key to preventing prediabetes from progressing to type 2 diabetes. Rather than eliminating entire food groups or following fad diets, focus on healthy, sustainable eating habits that support long-term blood sugar control.

With that in mind, the Mediterranean diet is recommended for people with prediabetes, with its emphasis on whole grains, lean protein and healthy fats.

Other recommended resources include the diabetes meal planning recommendations from the Centers for Disease Control and Prevention and a version of the MyPlate guidelines issued by the U.S. Department of Agriculture and adapted by the American Diabetes Association (ADA).

The ADA’s version of the recommendations suggests these proportions for meals:

• 50% of the plate filled with non-starchy vegetables, such as leafy greens
• 25% with healthy carbohydrates, such as whole grains like brown rice, farro or quinoa
• 25% with lean protein, such as chicken, turkey, fish or tofu
• Incorporate fiber to reach a goal of 25 to 30 grams per day by eating a variety of fruits, vegetables and whole grains

Foods to Limit if You Have Prediabetes

In general, many nutrition experts highlight certain foods that tend to spike blood sugar more quickly and are worth limiting. These include:

• Sugary drinks such as soda, sweetened teas, energy drinks, and fruit juices
• Refined carbohydrates like white bread, white rice, pastries, and regular pasta
• Highly processed snacks including chips, crackers and packaged baked goods
• Foods high in added sugars such as candy, desserts and sweetened cereals
• Fried foods that are high in saturated fats and can worsen insulin resistance
• Limit saturated fats like fatty cuts of meat, butter and full-fat diary to support insulin sensitivity and instead have healthy unsaturated fats, such as avocados, nuts, seeds, canola and extra virgin olive oil. 

Prediabetes and sugar — How much is too much?

Carbohydrates are the body’s main source of energy. Glucose (blood sugar) fuels every cell in the body and is the brain’s preferred fuel. While your body needs glucose to function, eating too much added sugar and refined carbohydrates can raise your blood sugar levels and worsen your diabetes.

Blood sugar levels are key indicators of prediabetes, so it’s important to be aware of hidden sources of sugar. Added sugars can be found in many processed foods, including breakfast cereals, frozen meals, protein bars, sauces and salad dressings.

Recommendations for Limiting Sugar

The World Health Organization (WHO) recommends limiting added sugar to less than 10% of your daily calorie intake and ideally to 5% or less for additional health benefits. For someone following a 2,000-calorie diet, this means consuming no more than 50 grams (about 12 teaspoons) of added sugar per day, with an ideal target of 25 grams (about 6 teaspoons). 

The American Heart Association recommends even lower limits, advising women to consume no more than 25 grams (6 teaspoons) of added sugar daily and men no more than 36 grams (9 teaspoons) per day.

Practical Tips for Limiting Sugar

• Choose water or unsweetened beverages instead of soda, sweet tea, energy drinks, and other sugary drinks.
• Read food labels and look for added sugars in packaged foods, snacks, and beverages.
• Eat whole fruits instead of candy, cookies, pastries, or other sugary desserts.
• Choose balanced meals and snacks with protein, fibre and healthy fats to help reduce sugar cravings.
• Limit highly processed foods that often contain hidden sugars and opt for whole, minimally processed foods whenever possible.

The Dietitian’s Guide: The 5-10-11 Added Sugar Rule

Food Label	Added Sugars (per serving)	What it Means
Best	0-5 g	15 Choose these foods most often. They are the best choice for supporting16 healthy blood sugar levels.17
Limit	6-10 g	23 Enjoy in moderation. Look for lower-added-sugar options when available.24
Avoid	11 g or more	30 Frequent intake can contribute to blood sugar spikes and increase the31 risk of progressing to type 2 diabetes.32

What should I eat for breakfast if I have prediabetes?

Choose foods that have lean protein, healthy fats, and high fibre carbohydrates. For example: Oatmeal topped with berries and pumpkin seeds with 1% milk, offer a well-balanced meal.

What fruits should I avoid with prediabetes?

Whole fruits can be part of healthy eating for people with prediabetes because they provide fibre, vitamins and antioxidants. Aim to choose whole fruits instead of fruit juice, which can raise blood sugar quickly. Consult with your healthcare provider regarding grapefruit as it can interact with certain medications.

How to Reverse Prediabetes — Lifestyle

Research studies such as the National Institutes of Health’s Diabetes Prevention Program Outcome Study (DPP) has consistently shown that healthy eating, regular physical activity, modest weight loss can reduce your risk of developing type 2 diabetes by 34% for four years compared to placebo, which was an outcome of the Johns Hopkins’ diabetes prevention program.

Stay active

Physical activity can help prevent diabetes while boosting heart health. People with prediabetes should try to get at least 150 minutes per week of moderate to vigorous exercise or aim for 10,000 daily steps. Be sure to check with your doctor before starting exercise or levelling up your current physical activity.

Small Weight Loss, Big Health Benefits

Even small amounts of weight loss can have a benefit. The ADA states that moderate rate reduction of 5% to 10% of your body weight can significantly lower your A1C level. 

Get Enough Sleep

The relationship between sleep, diabetes, and weight gain is important to understand. Sleep deprivation has been shown to increase people’s cravings for sugary foods, so people with prediabetes should make sure they’re getting seven to eight hours of sleep a night.

Limit Alcohol and Avoid All Tobacco

Limiting alcohol can help improve blood sugar control and reduce the risk of progressing from prediabetes to type 2 diabetes. Alcohol recommendations are no more than one drink per day for women and no more than two per day for men. 

Avoiding all tobacco products is also important, as smoking can increase insulin resistance and raise the risk of diabetes-related health complications.

Stay on Top of Your Numbers

People with prediabetes should be vigilant about their laboratory test results. If you’re at risk or have prediabetes, make sure you follow up with your A1C level with a blood test at least yearly.

Dietary Supplements and Prediabetes

Be cautious with dietary supplements. Some supplements may affect blood sugar and interact with diabetes medication. For example, ginseng, gingko, and garlic have been studied for their potential effects on blood glucose, but the evidence is mixed. In high doses—particularly when taken as concentrated supplements rather than as foods—they may increase the risk of low blood sugar (hypoglycaemia) in people taking diabetes medications.

Before starting any vitamin, mineral, herbal, or botanical supplement, talk with your physician, pharmacist, or registered dietitian to ensure it is safe, effective, and appropriate for your individual health needs and medications.

Work With a Dietitian if You Have Prediabetes 

Because many people with prediabetes may have other health conditions, such as high cholesterol or high blood pressure, it’s important to individualize nutrition recommendations. 

A registered dietitian can help develop a personalized nutrition plan that fits your lifestyle, improves blood sugar control, and reduces your risk of developing type 2 diabetes. Ask your primary care provider for a referral to a registered dietitian or check with your health insurance plan to see if nutrition counselling for prediabetes is covered.

Reversing Prediabetes — Is it possible?

A diagnosis of prediabetes does not mean that developing type 2 diabetes is inevitable. Healthy lifestyle changes—including eating a balanced diet, being physically active, maintaining a healthy weight, getting adequate sleep and managing stress—can help improve blood sugar levels and may prevent or delay the progression to type 2 diabetes. In many cases, these changes can even help return blood sugar levels to the normal range.

“Every healthy choice you make is an investment in your future health. Lasting changes doesn’t come from perfection; it comes with small, consistent changes.”

Evangelina DiSpirito, RDN, LDN, E-RYT 500, is an outpatient cardiac rehabilitation clinical dietitian at Johns Hopkins with more than 25 years of experience in nutrition counselling, including diabetes education. She specializes in helping individuals with prediabetes, diabetes and cardiovascular disease make sustainable nutrition and lifestyle changes to improve blood sugar management, support heart health, and reduce the risk of developing type 2 diabetes.

Medically reviewed by Evangelina DiSpirito, RDN, LDN, E-RYT 500. 

https://www.hopkinsmedicine.org/health/expert-qa/prediabetes-diet

Prediabetes diet: How to help prevent progression to type 2 diabetes

From health.harvard.edu

When it comes to this common condition, food really is one of the best medicines

Summary: A prediabetes diet is an eating plan that may help prevent prediabetes from turning into full-blown diabetes. Many different foods can fit into this style of eating, including fruits and vegetables, beans and legumes, lean proteins, whole grains, and healthy fats. While no foods are off-limits, prediabetes diets generally are low in sugary foods, refined carbohydrates, fast foods, fried foods, and alcohol.

There’s no one prediabetes diet. But following healthy eating habits can help you lower your blood sugar and reduce your risk for developing full-blown diabetes.

“It’s not about single foods or 'super’ foods but the overall eating pattern. Focusing on the average of what you eat also allows for small treats and occasionally dining out,” says Nancy Oliveira, a dietitian, certified diabetes care and education specialist, and manager of the Nutrition and Wellness Service at Harvard-affiliated Brigham and Women’s Hospital.

Here’s how you can update your menu to protect your health.

What is prediabetes?

Prediabetes is a condition in which your blood glucose (sugar) is higher than it should be — but not high enough to count as diabetes. With prediabetes and type 2 diabetes (which accounts for 90% to 95% of diabetes cases in the U.S.), high blood glucose occurs when your body is unable to use insulin efficiently. Over time, your body becomes unable to produce enough insulin. Insulin is the hormone that helps your body move blood sugar from your bloodstream into your cells for energy.

An optimal fasting blood glucose level is usually 70 to 99 milligrams per decilitre (mg/dL). When you have prediabetes, your fasting blood glucose is 100 to 125 mg/dL. (A fasting blood sugar of 126 mg/dL or higher indicates diabetes.)

Prediabetes can turn into type 2 diabetes when it isn’t managed. That can lead to long-term problems like heart disease, nerve damage, and kidney disease.

How can a prediabetes diet help lower blood sugar?

Lifestyle changes like eating a healthy diet and being more active are first-line treatments for prediabetes. Both of these things can bring your blood sugar levels closer to normal. That can slow or stop prediabetes from turning into diabetes.

A healthy eating pattern and attention to portion size can also help you lose excess weight. That in turn allows your body to use insulin more efficiently, making it easier for your cells to take up glucose from your bloodstream — bringing down your blood glucose levels.

It takes only a small amount of weight loss to reap the benefits. Studies show that losing around 7% of your body weight may be enough to keep diabetes at bay. For a 160-pound person, that’s a loss of around 11 pounds.

That said, diet changes can still make a difference even if you don’t lose much weight. “We see patients who might shed only 2 to 3 pounds despite following a diabetes-friendly diet, but their blood sugar and blood cholesterol still improve,” says Oliveira.

Best foods to eat for prediabetes

                                                                                              Image: © fcafotodigital/Getty Images

Many different foods can help control or lower your blood sugar when you have prediabetes. Consider adding these wholesome picks (in reasonable portion sizes) to your plate:

• non-starchy vegetables: asparagus, beets, broccoli, brussels sprouts, carrots, cauliflower, cucumbers, eggplant, leafy greens, mushrooms, peppers, summer squash, tomatoes, and zucchini
• lean protein: beans, eggs, fish and shellfish, lean poultry, lean red meat (like sirloin or flank steak), lentils, reduced-fat cheese, and soy foods (like tofu and tempeh)
• fresh fruit: apples, apricots, bananas, berries, melon, oranges, peaches, and pears
• whole grains and starchy vegetables: whole-wheat bread, whole-wheat pasta, brown rice, oatmeal, quinoa, sweet potatoes, skin-on white potatoes, winter squash, peas, and corn
• low-fat dairy: low-fat milk, plain Greek yogurt, and cottage cheese
• healthy fats: olive oil and olives, avocado, nuts, and seeds
• water and unsweetened drinks.

Complex carbs vs. refined carbs: What’s the difference?

The type of carbohydrates you eat can have a big effect on your blood sugar. Choosing complex or minimally refined carbs can make it easier to manage your prediabetes.

When you have a food or drink that contains carbohydrates, your body breaks the carbs down into glucose. This enters your bloodstream, raising your blood glucose levels. In response, your pancreas releases insulin to move the glucose into your cells, where it can be used for energy.

Refined or simple carbs get broken down into glucose quickly. They cause a rapid spike in blood glucose levels, which can make it harder to control your prediabetes.

Foods high in refined carbs include white bread, white pasta, white rice, soda, fruit juice, baked goods, candy, and other foods high in added sugars. “If you’re consuming these items daily and at most meals and not moving much, your pancreas will work overtime to make insulin, which can stress it so much it may eventually not work as well, leading to diabetes,” Oliveira explains.

Complex carbohydrates help control your blood sugar. They contain fibre, so they’re broken down at a slower rate. As a result, they have less of an effect on your blood glucose. Foods high in complex carbs include whole grains such as whole-wheat bread, whole-wheat pasta, brown rice, oatmeal, and quinoa, as well as beans and other legumes, and starchy vegetables (like corn, sweet potatoes, and peas).

Food and drinks to limit with prediabetes

Limiting foods and drinks with refined carbs and unhealthy fats, both of which can make your cells less responsive to insulin, can make it easier to manage your blood glucose. Over time, that may help you avoid diabetes.

Try to have the following less often:

• sugary foods and snack foods such as cookies, candy, ice cream, sweetened cereal, packaged granola bars, chips, pretzels, and canned fruit with added sugar
• sugary drinks such as soda, fruit juice, sweet tea, sweetened coffee and tea drinks, sports drinks, and energy drinks
• refined carbohydrates such as white bread, white pasta, white rice, and white tortillas
• fast food and fried foods high in saturated fat
• excess alcohol.

Can you reverse prediabetes with diet and lifestyle changes?

Healthy eating patterns and regular exercise may be able to bring your fasting blood glucose back within normal range. That can effectively reverse your prediabetes.

The key is choosing lifestyle changes you can stick with. That way you can maintain your well-earned benefits long-term. Prediabetes can return if you go back to your old eating and activity habits.

Sample prediabetes diet plan and meal ideas

The best prediabetes eating plan is one that you enjoy and that fits with your lifestyle. Consider choosing from options like the Mediterranean diet, the DASH diet, or another plant-based or low-carbohydrate diet. These have all been shown to prevent prediabetes progression — and can be customized to work for you.

You can find helpful meal planning guides and sample recipes at the American Diabetes Association’s Diabetes Food Hub. Many of these meals use the Diabetes Plate method, in which you divide your plate into three balanced sections:

• non-starchy vegetables on 50% of your plate
• complex carbohydrates on 25% of your plate
• lean protein on 25% of your plate.

Here are some examples of combinations that you might prepare under the Diabetes Plate method:

• turkey meatloaf with a mixed green salad and quinoa
• baked salmon with sauteed garlicky greens and a sweet potato
• tofu and bell pepper stir-fry with brown rice
• roasted skinless chicken with air-fried baby potatoes and cauliflower florets
• lentil soup with kale, diced tomatoes, and chopped sweet potato.

How to lower A1c and help prevent diabetes long-term

You can see the effect of lifestyle changes over time by looking at your haemoglobin A1c levels. This blood measurement reflects your average blood sugar over the past three months. Getting this number close to or within the normal range can reduce your diabetes risk.

Resist the urge to make lots of big changes at once. Smaller shifts in your diet and activity level may be easier to maintain. And they can add up to healthier blood sugar long-term.

Talk with your doctor to decide on a plan for monitoring your blood sugar. The American Diabetes Association recommends checking your A1c annually, but depending on your risk factors and progression of prediabetes, your doctor may advise rechecking it sooner.

https://www.health.harvard.edu/diet-and-nutrition/prediabetes-diet-how-to-help-prevent-progression-to-diabetes