Published: December 2022
Last updated: September 21, 2026
Next review: September 2027, or sooner if major diabetes guidance changes.
Written and source checked by: Adel Galal, Founder and Lead Writer at NextFitLife
Medical review status: This article has not been medically reviewed by an endocrinologist, diabetes specialist, registered dietitian, pharmacist, or other licensed healthcare professional.
Prediabetes information and FAQs can help you understand a blood sugar result before it becomes type 2 diabetes. Prediabetes means glucose is above the normal range but below the diabetes range. Most people have no clear symptoms, so a blood test is the only reliable way to know.
Prediabetes is serious, but it is also a chance to act early. Food changes, regular movement, weight care when needed, better sleep, smoking cessation, and medical treatment for selected people can lower the chance of type 2 diabetes.
This guide explains the test numbers, warning signs, causes, risks, screening rules, food and exercise goals, metformin, follow up, and the questions people ask most.
For a deeper look at why blood sugar starts to rise, read Prediabetes Causes.
Medical Notice
I am not a dermatologist or A doctor, and this content does not replace professional medical advice. What I share comes from real-life experience, extensive research, and consultation with healthcare providers. Always consult qualified medical professionals for diagnosis and treatment of any health condition.
Prediabetes needs proper laboratory testing. A home glucose meter, smartwatch, or continuous glucose monitor cannot diagnose prediabetes by itself.
Do not start, stop, or change metformin, weight medicine, steroids, blood pressure medicine, cholesterol medicine, or another prescription because of something you read here.
Table of Contents
- Quick Answer
- How Common Is Prediabetes?
- What Prediabetes Means
- Prediabetes Test Ranges
- Signs and Symptoms
- Who Is at Higher Risk?
- Who Should Be Tested?
- Heart and Metabolic Risk
- How to Lower Your Risk
- Food
- Exercise
- Weight
- Metformin
- Can Glucose Return to Normal?
- Follow Up
- References and Sources
- Conclusion
- Internal Links and Hub
- About the Author
- 25 Frequently Asked Questions
Quick Answer: What Is Prediabetes?
Prediabetes means your blood sugar is higher than normal but not high enough for a diabetes diagnosis.
It often develops when your body becomes less responsive to insulin. This is called insulin resistance.
The pancreas then makes more insulin to help move glucose from the blood into cells. Over time, it may struggle to keep up and blood sugar rises.
Prediabetes raises the chance of type 2 diabetes and is also linked with higher cardiovascular risk.
How Common Is Prediabetes?
Prediabetes is very common.
CDC data updated in February 2026 estimate that 115.2 million adults in the United States have prediabetes. That is more than 2 in every 5 adults.
The harder part is that about 8 in 10 adults with prediabetes do not know they have it.
This happens because most people feel normal.
Screening matters more than waiting for symptoms.
What Happens Inside the Body?
Food is broken down into glucose, which enters the blood.
Your pancreas makes insulin. Insulin helps glucose move from the blood into your cells so it can be used for energy.
With insulin resistance, the cells do not respond as well.
The pancreas tries to solve this by making more insulin.
At first, this may keep glucose normal. Later, blood sugar starts to rise.
This can lead to prediabetes and, in some people, type 2 diabetes.
What Blood Test Results Mean Prediabetes?
| Test | Normal | Prediabetes | Diabetes |
|---|---|---|---|
| A1C | Below 5.7% | 5.7% to 6.4% | 6.5% or higher |
| Fasting glucose | Below 100 mg/dL | 100 to 125 mg/dL | 126 mg/dL or higher |
| Two hour glucose | Below 140 mg/dL | 140 to 199 mg/dL | 200 mg/dL or higher |
The two hour result comes from an oral glucose tolerance test. You drink a measured glucose drink, then your blood sugar is checked later.
What Is A1C?
A1C is a blood test that gives an estimate of your average blood glucose over the past few months.
You do not need to fast for an A1C test.
Some health conditions can make A1C less accurate. These include certain types of anemia, blood disorders, pregnancy, recent blood loss, kidney failure, and conditions that change red blood cell life.
Your doctor may use fasting glucose or another test when A1C does not fit the full picture.
Does a Diabetes Result Need to Be Confirmed?
Usually, yes.
If you do not have clear symptoms of severe high blood sugar, the ADA says a diabetes result should normally be confirmed with another abnormal test.
A single result should be interpreted by a healthcare professional.
Does Prediabetes Cause Symptoms?
Usually, no.
Prediabetes can be present for years without clear symptoms.
This is an important correction to many older web articles.
Strong thirst, frequent urination, unexplained weight loss, blurry vision, and marked hunger are more typical warning signs of diabetes or higher blood sugar rather than mild prediabetes.
Do not wait for symptoms if you have risk factors.
A Dark Skin Patch Can Be a Clue
Some people with insulin resistance develop dark, thick skin around the neck, armpits, groin, or other skin folds.
This is called acanthosis nigricans.
It does not prove you have prediabetes, but it can be a reason to ask about testing.
Who Has a Higher Risk of Prediabetes?
Risk rises when several factors occur together.
Common risk factors include:
- Overweight or obesity
- Extra fat around the abdomen
- A parent, brother, or sister with type 2 diabetes
- Low physical activity
- High blood pressure
- High triglycerides
- Low HDL cholesterol
- PCOS
- Past gestational diabetes
- Heart or blood vessel disease
- Metabolic fatty liver disease
- Some medicines that can raise glucose
- Older age
Smoking, poor sleep, and sleep apnea may also add to the wider metabolic risk picture.
Can Prediabetes Happen at a Normal Weight?
Yes.
A higher body weight raises risk, but it is not required.
Family history, genes, age, PCOS, gestational diabetes, medicines, low activity, fatty liver, and other metabolic problems can affect risk at any body size.
Who Should Be Tested?
The 2026 ADA Standards recommend testing adults of any age who have overweight or obesity plus at least one diabetes risk factor.
For other adults, ADA screening should begin by age 35.
If results are normal, repeat testing is generally reasonable at least every three years. Testing can happen sooner when risk rises.
The U.S. Preventive Services Task Force uses a more targeted rule. It recommends screening adults ages 35 to 70 who have overweight or obesity.
These recommendations are not exactly the same because the groups use different screening frameworks.
What If You Had Gestational Diabetes?
Past gestational diabetes raises future diabetes risk.
The ADA recommends ongoing testing at least every one to three years for people with a history of gestational diabetes.
Keep getting checked even if glucose returned to normal after pregnancy.
Is Prediabetes Only a Blood Sugar Problem?
No.
Prediabetes often appears with other metabolic problems.
These can include:
- High blood pressure
- High triglycerides
- Low HDL cholesterol
- Extra abdominal fat
- Fatty liver
This is why the ADA says finding prediabetes should also lead to a review of heart and blood vessel risk.
Read Diabetes and Heart Diseases for a deeper look at heart risk.
Can Type 2 Diabetes Be Prevented or Delayed?
Yes, in many people.
The Diabetes Prevention Program showed that structured lifestyle changes can greatly lower the chance of type 2 diabetes in adults at high risk.
The goal is not a short diet.
It is a set of habits that can last.
The main areas are:
- Healthy food
- Regular movement
- Weight loss when needed
- Better sleep
- Smoking cessation
- Stress care
- Regular follow up
What Is a Diabetes Prevention Program?
A diabetes prevention program is a structured lifestyle program for people at high risk of type 2 diabetes.
It can include a trained coach, food guidance, activity goals, weight support, problem solving, and help keeping habits going.
The 2026 ADA Standards support both in person and approved technology based programs.
What Should You Eat With Prediabetes?
There is no single perfect prediabetes diet.
The 2026 ADA guidance recommends an individual plan based on food quality, total calories, metabolic goals, culture, preferences, and health needs.
A strong pattern can include:
- Nonstarchy vegetables
- Whole fruit
- Beans and lentils
- Lean protein
- Whole grains when suitable
- Nuts and seeds
- Plain dairy or suitable alternatives
- Healthy unsaturated fats
- Water and other unsweetened drinks
Limit sugary drinks, sweets, refined grains, heavily processed food, and frequent processed meat.
The ADA lists both Mediterranean diet and lower carbohydrate patterns among evidence based options for diabetes prevention.
For a full meal guide, read Prediabetes Diet.
How Much Exercise Helps?
A common diabetes prevention goal is at least 150 minutes of moderate activity each week.
Brisk walking is a simple example.
You can split the time across several days.
If 150 minutes feels far away, begin with a smaller amount and build slowly.
Strength work also helps because muscle uses glucose.
For a combined plan, read Prediabetes Diet and Exercise.
How Much Weight Loss Can Help?
Weight loss is not needed for every person with prediabetes.
For people who have overweight or obesity, current ADA prevention guidance uses a goal of at least 5% to 7% of starting body weight.
If a person weighs 100 kilograms, 5% is 5 kilograms.
If a person weighs 200 pounds, 5% is 10 pounds.
The goal should be safe and realistic.
Crash diets are not required.
For more help, visit the Weight Loss and Metabolism Hub.
Do People With Prediabetes Need Metformin?
Not everyone does.
Metformin has the strongest long term evidence among medicines used to delay or prevent type 2 diabetes in selected people with prediabetes.
The 2026 ADA Standards say metformin should be considered especially in people at higher risk, such as adults who:
- Are age 25 to 59
- Have BMI of 35 or higher
- Have fasting glucose around 110 mg/dL or higher
- Have A1C around 6.0% or higher
- Have a history of gestational diabetes
The decision is personal.
Metformin does not replace healthy food, movement, or other risk care.
Does Metformin Affect Vitamin B12?
It can.
The ADA recommends periodic vitamin B12 checks during long term metformin treatment, especially when anemia or nerve symptoms are present.
What About GLP 1 and Other Weight Medicines?
Weight treatment has changed a lot.
For people with prediabetes plus overweight or obesity, medicine may sometimes be used to support weight loss and lower metabolic risk when the person meets medical criteria.
These medicines are not simple “prediabetes cures.”
The choice should consider weight, heart health, side effects, cost, pregnancy plans, other diseases, and personal goals.
Use them only through proper medical care.
Can Prediabetes Go Away?
Blood glucose can return to the normal range in many people.
That is encouraging.
I prefer saying “glucose returned to the normal range” instead of promising a permanent cure.
The risk can rise again if weight, activity, medicines, illness, or other metabolic factors change.
Keep the habits that helped and keep getting tested.
Does Prediabetes Always Become Type 2 Diabetes?
No.
Some people progress to type 2 diabetes.
Some stay in the prediabetes range.
Others return to normal glucose.
Risk is usually higher when A1C or fasting glucose is closer to the diabetes range and when several other risk factors are present.
Can You Prevent Prediabetes With Supplements?
Do not build your prevention plan around supplements.
Cinnamon, chromium, herbal mixtures, detox drinks, and similar products have not replaced the proven value of food quality, activity, weight care, structured prevention programs, and medical treatment when needed.
Supplements can also interact with medicines or affect the liver and kidneys.
Do You Need a Continuous Glucose Monitor?
Most people with prediabetes do not need a CGM to diagnose the condition.
The 2026 ADA Standards say there is not enough evidence to use continuous glucose monitoring for screening or diagnosis of prediabetes or diabetes.
Your clinician may still use glucose monitoring for a special reason.
How Often Should Prediabetes Be Checked?
The 2026 ADA Standards recommend testing people with prediabetes for progression to diabetes at least once each year.
Testing may be more frequent if:
- A1C is close to 6.5%
- Fasting glucose is close to 126 mg/dL
- Your glucose is rising
- Your weight changes quickly
- You start a medicine that can raise glucose
- You are planning pregnancy
- You had gestational diabetes
- Diabetes symptoms appear
When Should You Contact a Healthcare Professional?
Book a routine visit if you have prediabetes risk factors and have not been tested.
Talk with your clinician if a previous prediabetes result is rising or you are unsure what the result means.
Seek medical assessment if you develop:
- Strong thirst
- Frequent urination
- Unexplained weight loss
- Blurred vision
- Repeated infections
- Slow healing sores
- Marked weakness
These symptoms can occur when blood glucose has moved higher and should not simply be blamed on prediabetes.
References and Sources
The medical information in this article was checked against current diabetes testing, prevention, nutrition, and screening guidance.
- American Diabetes Association: Diagnosis and Classification of Diabetes, Standards of Care in Diabetes 2026
Current guidance on prediabetes test ranges, diabetes diagnosis, screening age, risk factors, annual testing, gestational diabetes follow up, and limits of CGM for diagnosis.
Read the ADA 2026 diagnosis guidance - American Diabetes Association: Prevention or Delay of Diabetes, Standards of Care in Diabetes 2026
Current guidance on annual monitoring, diabetes prevention programs, lifestyle treatment, higher risk groups, and metformin.
Read the ADA 2026 prevention guidance - American Diabetes Association: Positive Health Behaviors and Well Being, Standards of Care in Diabetes 2026
Current guidance on individualized food plans, 5% to 7% weight loss, vegetables, fruit, legumes, lean protein, whole grains, nuts, seeds, Mediterranean style eating, and physical activity.
Read the ADA 2026 lifestyle guidance - Centers for Disease Control and Prevention: Prediabetes, Your Chance to Prevent Type 2 Diabetes
Current public guidance on insulin resistance, risk factors, symptoms, lifestyle changes, and the National Diabetes Prevention Program.
Read the CDC prediabetes guide - National Institute of Diabetes and Digestive and Kidney Diseases: Preventing Type 2 Diabetes
U.S. government guidance on prediabetes, long term lifestyle changes, weight, physical activity, support programs, and metformin in selected people.
Read the NIDDK prevention guide
Conclusion: Use Prediabetes as an Early Warning
Prediabetes information and FAQs matter because this condition usually gives you time to act before type 2 diabetes develops.
Start with the facts. Know your A1C or glucose result, understand your risk factors, improve food quality, move regularly, work toward a healthier weight when needed, stop smoking, protect sleep, and keep your follow up tests.
Medicine such as metformin can help selected people, but no tablet replaces the full prevention plan.
Your next step: if you do not know your blood sugar status, ask whether you should be tested. If you already have prediabetes, choose one change you can repeat this week and review the full plan with your healthcare professional.
Internal Links and Hub
Continue with these NextFitLife guides for prediabetes, food, exercise, heart health, weight, and daily diabetes care:
- Prediabetes Causes
- Prediabetes Diet
- Prediabetes Diet and Exercise
- Prediabetes NHS
- Diabetes Lifestyle Routines
- Diabetes and Heart Diseases
- Weight Loss and Metabolism Hub
- Stress Reduction Techniques
25 Frequently Asked Questions About Prediabetes
1. What is prediabetes?
Prediabetes means blood glucose is higher than normal but below the level used to diagnose diabetes.
2. What A1C means prediabetes?
An A1C from 5.7% to 6.4% falls in the ADA prediabetes range.
3. What fasting blood sugar means prediabetes?
A fasting glucose from 100 to 125 mg/dL falls in the prediabetes range.
4. What oral glucose tolerance result means prediabetes?
A two hour glucose result from 140 to 199 mg/dL after a 75 gram glucose drink falls in the prediabetes range.
5. Is A1C 6.5% still prediabetes?
No. An A1C of 6.5% or higher reaches the diabetes range. Diagnosis usually needs confirmation when there are no clear symptoms or glucose emergencies.
6. Does prediabetes cause symptoms?
Most people have no clear symptoms. Strong thirst, frequent urination, unexplained weight loss, or marked blurry vision should lead to medical testing because glucose may be higher.
7. What causes prediabetes?
The main process is often insulin resistance. Genetics, abdominal fat, low activity, age, PCOS, gestational diabetes, some medicines, and other metabolic problems can raise risk.
8. Can thin people get prediabetes?
Yes. Body weight is only one risk factor. Family history, genes, age, PCOS, medicines, fatty liver, and other conditions also matter.
9. Does eating sugar cause prediabetes?
Sugar alone is not the single cause. A pattern high in sugary drinks and excess calories can add to weight gain and insulin resistance, but many other factors affect risk.
10. Can stress cause prediabetes?
Stress is not usually the single cause. Long term stress can affect sleep, food choices, activity, hormones, and weight, which can add to metabolic risk.
11. Does poor sleep raise the risk?
Poor sleep and sleep disorders can make glucose control harder and may add to insulin resistance. Sleep apnea is also linked with metabolic risk.
12. Does PCOS increase prediabetes risk?
Yes. PCOS is often linked with insulin resistance and a higher risk of type 2 diabetes.
13. Does gestational diabetes raise future risk?
Yes. A history of gestational diabetes raises the future risk of prediabetes and type 2 diabetes, even when glucose returns to normal after pregnancy.
14. Can prediabetes return to normal?
Yes. Many people can bring glucose back into the normal range through lifestyle changes and, when appropriate, medical treatment.
15. Does prediabetes always turn into diabetes?
No. Some people progress, some stay in the prediabetes range, and others return to normal glucose levels.
16. How much weight loss can help?
If you have overweight or obesity, current ADA guidance uses a goal of at least 5% to 7% weight loss for diabetes prevention.
17. How much exercise should I get?
A common prevention goal is at least 150 minutes of moderate activity per week. Walking is a good place to start for many people.
18. What diet is best for prediabetes?
There is no single best diet. Mediterranean style and lower carbohydrate eating patterns both have good evidence. The best plan is healthy, balanced, and realistic for you.
19. Can I eat fruit with prediabetes?
Yes. Whole fruit can fit a healthy plan. Portion size still matters, and whole fruit is usually a better everyday choice than juice.
20. Can I eat bread or rice?
Yes. You do not need to ban them. Choose higher fiber options when possible, use sensible portions, and pair them with protein and vegetables.
21. Do I need metformin?
Not everyone does. Metformin is considered more often for people at higher risk, including some younger adults, people with BMI 35 or higher, higher glucose or A1C, or past gestational diabetes.
22. Do I need to check glucose every day?
Most people with prediabetes do not need several daily glucose checks. Ask your clinician whether home testing would add useful information in your case.
23. Do I need a continuous glucose monitor?
Usually not for diagnosis. The 2026 ADA Standards say there is not enough evidence to use CGM alone to screen for or diagnose prediabetes.
24. How often should prediabetes be retested?
The 2026 ADA Standards recommend checking for progression to diabetes at least once each year after prediabetes is found.
25. When should I see a doctor?
See a healthcare professional if you have an abnormal A1C or glucose result, strong risk factors, or symptoms such as frequent urination, strong thirst, unexplained weight loss, blurry vision, or repeated infections.
Health & wellness writer with 30+ years of experience in nutrition, fitness, and healthy aging. Founder of NextFitLife.com — evidence-based health guidance.
