What is the normal blood sugar level when the blood is empty?

Due to various reasons, some people often have abnormal blood sugar levels. For example, many working people do not like to eat breakfast, so they often have hypoglycemia. Obese people and middle-aged and elderly people often have high blood sugar levels. There are many foods in life that can lower blood sugar, such as black fungus, bitter gourd, yam, carrots, etc. So, what should be the normal blood sugar level when a person is fasting?

What is normal fasting blood sugar?

1. What is the normal value of fasting blood sugar in the morning?

The normal morning fasting blood glucose value is 3.89-6.1mmol/L. If it is greater than 6.1mmol/L and less than 7.0mmol/L, it is impaired fasting blood glucose. If the fasting blood glucose is greater than or equal to 7.0mmol/L twice, diabetes is considered. It is recommended to recheck the fasting blood glucose and glucose tolerance test. If the random blood sugar level is greater than or equal to 11.1mmol/L, diabetes can be diagnosed. If blood sugar is lower than 2.8mmol/L, the corresponding clinical symptoms are called "hypoglycemia".

2. Will drinking water in the morning affect blood sugar measurement?

In fact, drinking boiled water will not interfere with blood sugar monitoring results. The "fasting" required for fasting blood glucose monitoring generally refers to no calorie intake, such as eating staple foods, meat, eggs, milk and other foods, without strictly restricting drinking water. So you can eliminate your concerns and drink a small amount of water if you are thirsty before measuring your fasting blood sugar. However, some sugary drinks should be limited as they may affect the results of blood sugar tests. The increase in Ms. Peng’s blood sugar cannot rule out the effect of honey water, so she needs to have her blood sugar tested again.

In addition, the following two points can improve the accuracy of blood sugar measurement:

2.1. To measure fasting blood sugar, it is necessary to draw blood before 8:00 a.m., especially for patients treated with insulin. The fasting blood must be drawn before the insulin injection time in the morning, otherwise it cannot truly reflect the control of diabetes.

2.2. Blood sugar levels will also rise in various stressful situations. Mood swings, insomnia, fever, fatigue, etc. can all affect blood sugar levels, so avoid strenuous exercise on the way to the hospital.

3. What is the normal blood sugar level after a meal?

3.1. Normal fasting blood sugar value:

The normal index is 3.9-6.1mmol/L, and the blood sugar index should be less than 6.2. If the fasting blood sugar level is higher than normal, greater than or equal to 6.7, twice the test is repeated, it can generally be diagnosed as diabetes.

3.2. Normal blood sugar level after meal:

(Two hours after meal): The normal index is 3.9-7.8mmol/L, and the blood sugar index should be lower than 7.8. If the blood sugar level is higher than normal after two repeated tests two hours after a meal, diabetes can generally be diagnosed. If the result is greater than or equal to 7.8, further glucose tolerance test is required for diagnosis.

3.3. Generally, blood sugar before meals is >7.0mmol/l or blood sugar 2 hours after meals is ≥7.8, which is basically normal, but this is only for reference. It is recommended to go to the hospital for regular specialist examinations and accurate condition evaluation.