Diabetes is a disease that occurs when your blood glucose, also called blood sugar, is too high. Glucose is your body’s main source of energy. Normally, a hormone made by the pancreas called insulin helps glucose get into your cells to be used for energy. If you have diabetes, your body doesn’t make enough insulin or use insulin properly. Glucose then stays in your blood and doesn’t reach your cells.
Anyone can get type 2 diabetes, even children. But certain factors can raise your risk. You’re more likely to develop type 2 diabetes if you are at least 35 years old or have a family history of diabetes.
Black Americans, Hispanic/ Latino Americans, American Indians, and Asian Americans are also at higher risk.
People who are overweight or have obesity and people who don’t get enough physical activity are also more likely to develop the disease. But these are changeable factors.
About 1 in 3 American adults has a condition called prediabetes. It occurs when your blood sugar is higher than normal, but not yet high enough to be called diabetes. Most people with prediabetes don’t realize they have it. That’s because prediabetes tends to have few symptoms, and many people don’t get screened.
“We can diagnose prediabetes and diabetes with a very simple blood test known as a hemoglobin A1C. You don’t need to fast to do this test,” says Dr. Tannaz Moin, a physician and diabetes researcher at the University of California, Los Angeles. The A1C test reflects your average levels of
blood sugar over the past three months.
“Prediabetes is viewed as a very strong risk factor for type 2 diabetes. But not everyone with prediabetes goes on to develop type 2 diabetes,” Moin adds. “That’s why it’s important to be screened and talk with your medical providers about your risk factors and things that you can do to prevent type 2 diabetes if you’re at risk.” A Role for Medications Although making healthy lifestyle changes has proven effective for preventing diabetes, it doesn’t work for everyone. For those people, medications may help.
NIH’s DPP study looked at whether the diabetes drug metformin might also prevent or delay diabetes onset. It found that the drug could reduce the risk of developing diabetes by about 30 % . For some patients, a combination of metformin and lifestyle changes might be best.
In recent years, a class of drugs called GLP-1 drugs has become widely available for weight management and diabetes treatment. These drugs have proven effective at reducing weight and keeping blood glucose in check. Some studies hint that they might also help to prevent or delay diabetes.
“Body weight is an important factor that determines the risk of getting type 2 diabetes. So the potential here is great,” says Knowler. “But the problem is, as with any new drugs, it takes many years to know how effective and safe they will be. And a huge problem with any kind of weight loss is
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sustaining it, not achieving it.”
Because GLP-1 drugs are still relatively new, it’s not entirely clear how outcomes will change if people stop taking the drugs. And possible side effects of long-term use are still uncertain.
Healthy Changes That Last
“Making lifestyle changes is hard. So it’s important to get the support you need to make the changes last,” says Dr. Joshua J. Joseph, a physician and diabetes researcher at Ohio State University. “You can get that support through programs like the CDC’s National Diabetes Prevention Program (NDPP).”
NDPP is based on the findings of NIH’s DPP study. It aims to help people make long-term lifestyle changes that prevent or delay diabetes (see the Wise Choices box).
Local hospitals, health departments, libraries, senior centers, and faith-based organizations may also offer programs or seminars to help prevent type 2 diabetes. For physical activity, look for activities that you enjoy. Experts recommend brisk walking for a low-cost activity. Working out with others can be motivating for some people. Consider group classes like Zumba or Pilates.
“It’s important to think of diabetes prevention throughout the lifespan. So, it’s just as critical to work with children on healthy eating and healthy behaviors as it is to work with older people,” Joseph explains. “If we work across the life course, it could lead to large reductions in the development of diabetes in the U.S. and around the world.” (NIH)
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