Is Fasting blood sugar 120 high, normal or dangerous? What does Glucose fasting level 120 mean?

📅 Medical Review Date: April 16, 2026

Your Fasting blood sugar level of 120 is a High Fasting blood sugar level.

A fasting blood sugar level of 120 mg/dL usually means the body is not using insulin properly. It suggests diabetes or prediabetes. High levels of fasting blood sugar can cause increased thirst, frequent urination, fatigue, blurred vision, dry mouth, slow-healing wounds, and recurrent infections. This can be caused by type 1 diabetes, type 2 diabetes, stress, or certain medications. Further tests are often needed to identify the cause and guide appropriate treatment.

High Fasting blood sugar levels may indicate underlying health problems. The normal range is typically between 74 mg/dL and 99 mg/dL. If your levels are outside this range, it's important to speak with a healthcare provider. Consulting a doctor is recommended to determine the cause and appropriate next steps.

The normal Fasting blood sugar range for men is :74 - 99 mg/dL

Ideal values of Fasting blood sugar depending on age (male) :

Age	Ideal Fasting blood sugar value
<5 years	74.888
5-10 years	75.787
10-15 years	76.696
15-20 years	77.616
20-25 years	78.547
25-30 years	79.49
30-35 years	80.444
35-40 years	81.409
40-45 years	82.386
45-50 years	83.375
50-55 years	84.376
55-60 years	85.389
60-70 years	86.414
70-80 years	87.451
80-90 years	88.5
90-100 years	89.562
>100 years	90.637

*Ideal values are calculated based on our database of patient records

Misdiagnosis is more common than people think—and the consequences can be serious. Delayed treatment, unnecessary medication, or worse. If you want a second opinion on your blood work, one option is to upload it to a site like wholebodyprotocol.com, where world-class doctors review your results. They charge a small fee—around $90 (though you'll want to check the latest price as it fluctuates)—and email you a detailed report. With over 12 million people affected by misdiagnosis every year, that little bit of extra peace of mind can go a long way.

Long-term complications of diabetes develop gradually. The longer you have diabetes the higher the risk of complications. Eventually, diabetes complications may be disabling or even life-threatening. Possible complications include:

• Kidney damage
• Eye damage
• Foot damage
• Alzheimer's disease
• Heart and blood vessel disease

You can learn techniques to reduce high Fasting blood sugar levels by reading this 100 page eBook. This book is written by a patient himself and reviewed by the doctors of Medchunk. Read eBook here.

Normal range of Fasting blood sugar found among women :74-99 mg/dL

Ideal values of Fasting blood sugar depending on age (female) :

Age	Ideal Fasting blood sugar value
<5 years	74.915
5-10 years	75.841
10-15 years	76.778
15-20 years	77.727
20-25 years	78.688
25-30 years	79.661
30-35 years	80.646
35-40 years	81.643
40-45 years	82.652
45-50 years	83.674
50-55 years	84.708
55-60 years	85.755
60-70 years	86.815
70-80 years	87.888
80-90 years	88.974
90-100 years	90.074
>100 years	91.187

If you take a Fasting blood sugar blood test and the results are not in the normal range (74-99 mg/dL), your physician may recommend more tests to figure out the problem. You might also get this test if your physician thinks you have some other disease.

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How the Fasting blood sugar Test Is Done :

When your doctor orders a Fasting blood sugar test, it involves a straightforward blood draw to measure your Fasting blood sugar levels. A pathologist or lab technician will take a small sample of blood from a vein using a needle. Your Fasting blood sugar test results are usually available within a few hours.

Medical References

• Cleveland Clinic – Fasting Blood Sugar: Testing, Levels & What They Mean
• MedlinePlus – Blood Glucose Test
• NIH – The A1C Test & Diabetes

Fasting blood sugar treatment - Click to read 10 GOLDEN ARTICLES on Diabetes