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Blood sugar testing: Why, when and how

Why test blood sugar

Blood sugar testing gives useful information to manage diabetes. It can help you:

  • Track the effect of diabetes medicine on blood sugar levels.
  • Adjust doses of diabetes medicines with the guidance of your treatment team.
  • Find out if blood sugar levels are high or low. Then, if needed, change treatment to treat high blood sugar or take fast-acting carbohydrates to treat low blood sugar.
  • Track progress in reaching your treatment goals.
  • Learn how diet and exercise affect blood sugar levels.
  • Understand how other factors, such as sickness or stress, affect blood sugar levels.