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By Mayo Clinic staffThe glucose challenge test is done in two steps. When you arrive at your doctor's office or lab, you'll drink about 8 ounces (237 milliliters) of a syrupy glucose solution that contains 50 grams (1.8 ounces) of sugar. The glucose solution is often cola- or orange-flavored. In some facilities, the glucose is given in the form of jelly beans. One hour later, a member of your health care team will take a sample of blood by pricking your fingertip or inserting a needle into a vein in your arm. This blood sample will be used to measure your blood sugar level.
After drinking the glucose solution, you'll likely need to remain in the doctor's office or lab while you're waiting for your blood sugar level to be tested. After the glucose challenge test, you can return to your usual activities immediately.
