There’s a lot to know about diabetes—here are the basics.

If you have diabetes or know someone who does, you’re not alone. That’s because diabetes affects more and more people each and every day. In fact, more than 20 million people in the United States have diabetes.* And many of these people (about 6 million) don’t even know they have diabetes.

The good news is that by taking an insulin, like Levemir, and making healthy lifestyle choices, people with diabetes can help manage their condition. Adding both exercise and good nutrition is also an important part of treatment.