Is Serum Glucose 18.6 high, normal or dangerous? What does Serum Glucose level 18.6 mean?

📅 Medical Review Date: February 14, 2026

Your Serum Glucose level of 18.6 is a High Serum Glucose level.

High Serum Glucose levels may indicate underlying health problems. The normal range is typically between 3.9 mmol/L and 5.6 mmol/L. 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 Serum Glucose range for men is :3.9 - 5.6 mmol/L

Ideal values of Serum Glucose depending on age (male) :

Age	Ideal Serum Glucose value
<5 years	3.973
5-10 years	4.047
10-15 years	4.122
15-20 years	4.199
20-25 years	4.277
25-30 years	4.357
30-35 years	4.438
35-40 years	4.521
40-45 years	4.605
45-50 years	4.691
50-55 years	4.778
55-60 years	4.867
60-70 years	4.958
70-80 years	5.05
80-90 years	5.144
90-100 years	5.24
>100 years	5.337

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

Get Advice via Email : Send us your blood test report, and our Serum Glucose experts will review it. You'll receive a detailed analysis and personalized treatment guidance via email within 12 hours. If you have additional blood test results besides Serum Glucose, please include those too—an accurate diagnosis often requires a full view of all abnormalities. Upload blood test report now

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Normal range of Serum Glucose found among women :3.9-5.6 mmol/L

Ideal values of Serum Glucose depending on age (female) :

Age	Ideal Serum Glucose value
<5 years	3.975
5-10 years	4.051
10-15 years	4.129
15-20 years	4.208
20-25 years	4.289
25-30 years	4.371
30-35 years	4.455
35-40 years	4.54
40-45 years	4.627
45-50 years	4.716
50-55 years	4.806
55-60 years	4.898
60-70 years	4.992
70-80 years	5.088
80-90 years	5.185
90-100 years	5.284
>100 years	5.385

If you take a Serum Glucose blood test and the results are not in the normal range (3.9-5.6 mmol/L), 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 Serum Glucose Test Is Done :

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

Medical References

• Cleveland Clinic – Blood Glucose (Sugar) Test: Levels & What They Mean
• MedlinePlus – Blood Glucose Test
• Mayo Clinic – Blood sugar test
• WebMD – Blood Glucose Test: How It Is Done, What It Means