September 12, 2021

Normal Fasting Blood Sugar Level USA 2024

Topic: Normal Fasting Blood Sugar Level USA 2024

Normal Fasting Blood Sugar Level USA 2024

Normal Fasting Blood Sugar Level USA 2024

We are all more or less familiar with the word blood sugar. But many of us have no actual idea of what the functionality of blood sugar level is and how it affects our body. Moreover, we all hear about high blood sugar levels but what is the range of normal blood sugar we don’t know.

There are many more students who do not have the subject biology, but blood sugar, pressure, and all are our human body functions so we can’t ignore them because of just not having the subject. 

So It is a short description of blood sugar levels, process of testing, and type of blood sugar that will be helpful for everyone whether you have the subject or not. In this article, I am going to discuss normal fasting blood sugar level USA 2024

What is Blood Sugar?

Blood sugar is the amount of glucose present in your blood, it is measured by mg/dl. The number of glucose changes throughout the day and night. Your sugar level will change depending on your lifestyle, what you eat, when and how much you’ve eaten. And also whether or not you have exercised.

State of Blood Sugar in Human body

As we can see that sugar levels change throughout the day and night so we have to decide what is the normal, high, and low level of sugar concerning something. There are 3 to 4 types of processes for testing blood sugar. 

But we use the most fasting blood glucose. Based on the fasting blood sugar process the expected value for normal blood sugar is 70 mg/dL to 100 mg/dL. When fasting blood glucose is between 100 to 125 mg/dL then it’s called prediabetic condition. 

If the level is 126 mg/dL or more then it indicates diabetes. Here I am adding a chart of normal sugar with age so that you can understand better.

Normal Blood Sugar Level 

Age groups Fasting Before meal 1-2 hours after a meal Bedtime
Children, less than 6 years 80-180 mg/dL 100-180 mg/dL ~180 mg/dL 110-200 mg/dL
Adolescents, 6-12 years 80-180 mg/dL 90-180 mg/dL Up to 140 mg/dL 100-180 mg/dL
Teen, 13-19 years 70-150 mg/dL 90-130 mg/dL Up to 140 mg/dL 90-150 mg/dL
Adults, more than 20 years Less than 100 mg/dL 90-130 mg/dL Less than 180 mg/dL 100-140 mg/dL

Estimation Process of Blood Glucose

1.   A1C test

In this method, your average blood sugar of 2-3 months is measured. An A1C less than 5.7%is normal, 5.7-6.4% indicates that your sugar level is in a prediabetic state and more than 6.5% indicates you have diabetes.

2.   Fasting Blood sugar test

A fasting blood sugar test measures your blood glucose after an overnight or 8-9 hours fast.

3.   Glucose Tolerance test

In this method your blood glucose is checked before and after you drink glucose-containing liquid. After overnight fasting your sugar level will be checked then you have to drink the liquid and after 1,2 and 3 hours simultaneously your sugar level will be checked. Read more about Normal Fasting Blood Sugar Level USA 2024

4.   Random Blood Sugar Test

Here the random word describes the method. In this process, you can check your blood sugar level at any time. But among these four processes, the second one means fasting blood sugar test gives the most appropriate and dependable result. So this method is used in most cases.

Results A1C test Fasting blood sugar test Glucose Tolerance test Random Blood Sugar Test
Diabetes 6.5% or more than that 126 mg/dL or more 200 mg/dL or above 200 mg/dL or more
Prediabetic 5.7 – 6.4% 100-125 mg/dL 140-199 mg/dL NA
Normal Less than 5.7% 70-100 mg/dL Less than 140 mg/dL NA

Why is Fasting Blood sugar more appropriate?

When we eat carbohydrates containing food then it forms glucose in our body and that produces energy. But in this process, some hormones also take part that controls our blood glucose levels. Mainly two hormones control the sugar levels which are insulin and glucagon. 

The main function of insulin is to decrease the amount of glucose in blood and glucagon does exactly the opposite function of insulin. In such a way they balance the amount of glucose present in your blood. 

When your pancreas doesn’t produce sufficient insulin to balance the sugar level or if the insulin is not enough to control your sugar level then you will face diabetes type 1 or type 2.

But the question is why we choose the fasting blood sugar test among all? Because when we consume or intake some food, we don’t know how much carbohydrates are in it. 

So after immediately having food our sugar level will be high. After some time the intake of food will start to proceed as glucose but we don’t know how much time will be taking. So it is not possible to correctly measure the normal fasting blood sugar level USA 2024.

Glucagon on Normal Fasting Blood Sugar Level USA 2024

In the time of fasting means 8 to 12 hours you can’t eat or drink except water, the hormone glucagon stimulates at the time of fasting.

As we know, the functionality of glucagon is increasing the glucose level of blood, then to balance the blood glucose level insulin stimulates from that process after checking sugar levels we can understand the efficiency of insulin.

If the level of glucose is normal then your insulin efficiency is correct. So fasting is not only important to check your sugar level but also used to check hormonal efficiency.

This fasting test is also used to test the effectiveness of different medicines and supplements that people already use to control their sugar levels.


In 1997, the American Diabetes Association reduced the sugar level from 140 to 125 as a normal sugar level indicator. Sugar level also increases as a result of Cushing’s syndrome, liver or kidney disease.

Increased sugar levels may cause different symptoms and diseases further. So if you are in a prediabetic state then consult your doctor and start to follow a proper diet plan and exercise to rebalance your sugar level. I hope this piece of information will help you to understand normal fasting blood sugar level USA in 2024.