Pre-Diabetes: What the Numbers Mean

Pre-diabetes means your blood sugar is higher than normal but not yet in the diabetic range. Your doctor identifies it through a blood test — usually a fasting glucose test, an A1C test, or a glucose tolerance test. The numbers matter because pre-diabetes is reversible. You can bring your blood sugar back to normal through changes you make now, before it becomes type 2 diabetes.

The three tests measure different things. A fasting glucose test checks your blood sugar after you have not eaten for eight hours — a result between 100 and 125 mg/dL signals pre-diabetes. An A1C test shows your average blood sugar over the past three months; a result between 5.7 and 6.4 percent indicates pre-diabetes. A glucose tolerance test measures how your body handles sugar after you drink a sweet liquid; a result between 140 and 199 mg/dL two hours later means pre-diabetes. Your doctor may use one or more of these tests.

Pre-diabetes usually has no symptoms. Most people find out they have it during a routine checkup or when a doctor orders blood work for another reason. That is why screening matters, especially if you are over 45, overweight, have a family history of diabetes, or have high blood pressure or cholesterol.

Key Takeaways

  • Pre-diabetes is diagnosed through a blood test showing blood sugar between normal and diabetic ranges, and it can be reversed through diet and exercise changes.
  • The CDC's Diabetes Prevention Program is a structured 16-week course that teaches weight loss, physical activity, and stress management, and it reduces the risk of developing type 2 diabetes by 58 percent in people over 60.
  • You can find a Diabetes Prevention Program through your doctor, local health department, hospital, or by searching the CDC's online registry at no cost or low cost depending on your insurance.
  • Weight loss of 5 to 10 percent of your body weight, combined with 150 minutes of moderate activity per week, can prevent or delay type 2 diabetes.
  • Your doctor should monitor your blood sugar every three to six months to track whether your changes are working.

The Diabetes Prevention Program: The Structured Route

The Diabetes Prevention Program (DPP) is a 16-week course run by the CDC that teaches you how to prevent type 2 diabetes. It is not a diet plan or a medication — it is a class where you learn to change eating habits, add physical activity, and manage stress. The program is evidence-based: studies show it reduces the risk of developing type 2 diabetes by 58 percent in people under 60 and by 71 percent in people over 60.

A DPP class meets once a week for 16 weeks, then monthly for maintenance. Each session lasts about an hour. You work with a trained lifestyle coach who helps you set realistic goals — usually starting with a 5 to 10 percent weight loss — and troubleshoot the obstacles you actually face. You also meet other people with pre-diabetes, which many find helpful because you are not alone in this.

The program covers how to read food labels, choose portions that work for you, fit activity into your day without a gym membership, and handle stress and sleep. It is practical, not theoretical. Your coach asks what you ate yesterday and helps you see where small changes add up.

Where to Find a Diabetes Prevention Program Near You

The CDC maintains an online registry of DPP programs across the country. Visit diabetes.org/prevention or search the CDC's registry directly to find programs in your area. You can filter by zip code, program type (in-person or online), and whether the program is covered by your insurance.

You can also ask your doctor for a referral — many primary care doctors know which programs are available locally and can refer you directly. Your local health department, hospital, or community health center may run a DPP program. Some are free; others charge a small fee, often covered by Medicare, Medicaid, or private insurance if you have a pre-diabetes diagnosis.

Online programs are also available if you cannot attend in person. These work the same way — weekly sessions with a coach and other participants — but happen on video or through an app. The CDC registry shows which programs are available in your state.

Changes You Can Make on Your Own

If you cannot join a structured program, you can still make changes that matter. The goal is a 5 to 10 percent weight loss combined with 150 minutes of moderate activity per week. Moderate activity means you can talk but not sing — a brisk walk, light cycling, or swimming at a steady pace.

For eating, focus on swapping rather than cutting. Replace sugary drinks with water, unsweetened tea, or coffee. Choose whole grains instead of white bread or rice. Add vegetables to half your plate. Eat protein at each meal — chicken, fish, beans, eggs, or yogurt — because protein keeps you fuller longer. Limit processed foods, fried foods, and foods with added sugar. These changes do not require a special diet or expensive food.

For activity, start where you are. If you do not exercise now, a 10-minute walk after meals is a real start. If you already walk, add a second walk or make one walk longer. Strength training two or three times a week — even bodyweight exercises at home — helps your body use insulin better. The point is consistency, not intensity.

Monitoring and Follow-Up With Your Doctor

Your doctor should retest your blood sugar every three to six months to see whether your changes are working. This matters because it tells you whether you are moving back toward normal or whether you need to adjust your approach. Some people reverse pre-diabetes in a few months; others take longer. Both are normal.

Bring your blood sugar results and a note about what you have changed — weight loss, activity, foods you have cut back on — to your appointments. Your doctor can see what is working and help you troubleshoot if progress stalls. If your blood sugar is moving in the right direction, keep doing what you are doing. If it is not, your doctor may suggest a medication like metformin to slow the progression while you continue making lifestyle changes.

Tell your doctor if you are struggling with the changes you are trying to make. Hunger, cravings, fatigue, or lack of time are real obstacles, not personal failures. Your doctor or a dietitian can help you find approaches that fit your life.

Medications That May Help

Metformin is a medication that can slow the progression from pre-diabetes to type 2 diabetes. It works by helping your body use insulin more effectively and reducing the amount of sugar your liver releases. Studies show metformin reduces the risk of developing type 2 diabetes by 31 percent in people under 60.

Your doctor may suggest metformin if you are over 60, overweight, or have other risk factors like high blood pressure or a family history of diabetes. Metformin is not a replacement for diet and exercise — it works best alongside the changes you are making. It is inexpensive and usually covered by insurance. Common side effects are nausea or digestive upset, which often improve after a few weeks or when you take it with food.

Metformin is optional. Many people reverse pre-diabetes through diet and exercise alone. Talk with your doctor about whether it makes sense for your situation.

Frequently Asked Questions

Can pre-diabetes go away on its own without any changes?

Pre-diabetes does not usually reverse without changes. Without intervention, about 15 to 30 percent of people with pre-diabetes develop type 2 diabetes within five years. With diet and exercise changes, that risk drops significantly. The earlier you act, the better your chances of bringing your blood sugar back to normal.

Do I need to cut out all sugar and carbohydrates?

No. You do not need to eliminate sugar or carbohydrates. You need to eat smaller portions, choose whole grains over refined ones, and limit sugary drinks and processed foods. A piece of fruit, whole wheat bread, or brown rice are fine. The focus is balance and portion size, not elimination.

How much weight do I need to lose to reverse pre-diabetes?

A 5 to 10 percent weight loss — about 10 to 20 pounds for a 200-pound person — combined with regular activity can prevent or delay type 2 diabetes. You do not need to reach an "ideal" weight. Even modest weight loss, especially when paired with exercise, improves how your body handles blood sugar.

What if I have pre-diabetes and I am already active and eat well?

Pre-diabetes can happen to people who exercise and eat reasonably well, especially if you have a family history of diabetes or are over 45. Your genetics and age matter. Talk with your doctor about whether metformin or a Diabetes Prevention Program might help, and continue the healthy habits you already have — they are protecting you.

Does pre-diabetes mean I will definitely get type 2 diabetes?

No. Pre-diabetes is a warning, not a diagnosis of diabetes. With changes to diet and activity, many people bring their blood sugar back to normal. Even if you do develop type 2 diabetes later, the changes you make now slow that progression and reduce complications when it happens.