Sorry, you need to enable JavaScript to visit this website.

Can You Have Prediabetes and Not Know It?

While you have probably heard of diabetes, you may not be as familiar with the medical condition known as prediabetes. A person is said to have prediabetes when their blood sugar levels are higher than normal, but not high enough to be diagnosed with type 2 diabetes. Even though it’s estimated that more than 1 out of every 3 adults (that’s 84 million people) in the US has prediabetes, 90% of them don’t know it.

Studies have shown that most people with prediabetes develop type 2 diabetes within 10 years unless they take steps toward a healthier lifestyle. And having type 2 diabetes can lead to a number of serious health problems, including kidney failure, blindness, and damage to nerves that can result in amputation of a toe, foot, or leg. Learn more about prediabetes, its risk factors, and the steps you can take to help prevent it.

What causes high blood sugar?

A hormone in the body, called insulin, plays a key role in how the body uses glucose (a form of sugar we get from digested food) for energy. Insulin is made in an organ called the pancreas and is released into the bloodstream after we eat. When certain cells in the body cannot absorb glucose as easily (called insulin resistance), there is a buildup of sugar in the blood. Over time, this causes the pancreas to make more and more insulin as it tries to get the cells to respond the way they should. Eventually the pancreas can’t keep up and blood sugar levels rise. This can lead to prediabetes and type 2 diabetes.

Researchers believe that being overweight and a lack of physical activity are among the leading causes of insulin resistance. Some other causes of insulin resistance may include taking certain medications, steroid use, hormones, issues with sleep (such as sleep apnea), smoking, and older age.

Are you at risk for prediabetes?

Because prediabetes often has no signs or symptoms, many people don’t know they have it. However, there are a number of risk factors that increase the chances for developing it.

To find out if you are at risk for prediabetes, take a look at the statements below. If you have one or more risk factors, talk with your healthcare provider about testing. He or she can order a simple blood test to confirm it.

How do you diagnose prediabetes?

Since prediabetes generally has no signs or symptoms, diagnosis is generally based on the following blood tests:

Prediabetes questions

Download the Questions to Ask Your Healthcare Provider About Prediabetes here.

What you can do to prevent type 2 diabetes

If you have been diagnosed with prediabetes, it is important to work with your healthcare provider to improve your lifestyle habits. These lifestyle changes may help reduce your chances of developing type 2 diabetes. Key changes include:



  • 1. Centers for Disease Control and Prevention. Prediabetes. Accessed March 13, 2018.
  • 2. National Institute of Diabetes and Digestive and Kidney Diseases. Prediabetes & Insulin Resistance. Accessed March 13, 2018.
  • 3. Centers for Disease Control and Prevention. The Surprising Truth About Prediabetes. Accessed March 13, 2018.
  • 4. Prediabetes. Accessed March 14, 2018.
  • 5. National Institute of Diabetes and Digestive and Kidney Diseases. Family Health History Quiz. Accessed May 24, 2018.
  • 6. American Diabetes Association Standards of Medical Care in Diabetes—2018. Accessed July 10, 2018.
  • 7. American Diabetes Association. Diagnosing Diabetes and Learning About Prediabetes. Accessed July 10, 2018.