Knowing your blood glucose is essential for diabetes. Based on them, you can control both hypo and hyperglycemia that can lead to further complications. It’s usually the first question asked of your doctor. Which blood sugar levels do I have to have? When am I in range?

Blood glucose varies throughout the day. Blood sugar levels are usually lowest in the morning or after a period of fasting. And these levels rise during and after meals, as the body digests food.

According to the ADAmonitoring blood sugar levels helps people stay within their target ranges. This helps prevent long-term diabetes complications such as vision loss, heart or kidney disease. That is why it is very important that you have a global vision of your glucose data and analyze it with Cori.


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The goal for the diabetic is always to bring their blood sugar levels as close as possible to those of people without diabetes. Which are usually between 72 and 140 milligrams of glucose per deciliter of blood mg/dl.

However, people with diabetes tend to have somewhat higher blood glucose. Close to 80-180 mg/dl.

Time of the dayBlood sugar level person without diabetesBlood sugar level person with diabetes
Before food or on an empty stomach72–99 mg/dL80–130 mg/dL
2 hours after the start of a mealLess than 140 mg/dLLess than 180 mg/dL
A1C Results: Average Over a 3-Month PeriodLess than 5.7%Less than 7%

Abnormal blood sugar levels

Abnormal sugar levels are those that occur when there is too much or too little sugar in the blood. The ranges for a diabetic patient are:

  • Hypoglycemia: Or low blood sugar: 70 mg/dl or less blood sugar
  • Hyperglycemia: Or high blood sugar level: More than 18 mg/dl of blood glucose

What is a blood glucose test?

There are two ways to measure blood glucose, the current level and the average.


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