The results of your blood test can tell a lot about your health. They can help determine if you have an infection, diabetes, thyroid disorder, or other problems. You can also learn more about your heart and liver health and see if you have certain genetic conditions. If you're not sure what to expect from your blood test results, ask your doctor. He or she can explain what the results mean and how you can use them to take steps to stay healthy. A blood sample is collected from your arm or wrist. The sample