Is Fasting blood sugar 27 low, normal or dangerous? What does Glucose fasting level 27 mean?

📅 Medical Review Date: November 14, 2025

Your Fasting blood sugar level of 27 is a Low Fasting blood sugar level.

A fasting blood sugar level of 27 mg/dL usually means blood sugar is lower than normal after not eating. It suggests hypoglycemia. Low levels of fasting blood sugar can cause sweating, shakiness, confusion, blurred vision, headache, weakness, irritability, and fainting. This can be caused by diabetes medication overdose, insulinoma, adrenal insufficiency, or prolonged fasting. Further tests are often needed to identify the cause and guide appropriate treatment.

Low 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	75.998
5-10 years	78.05
10-15 years	80.157
15-20 years	82.321
20-25 years	84.544
25-30 years	86.827
30-35 years	89.171
35-40 years	91.579
40-45 years	94.052
45-50 years	96.591
50-55 years	96.521
55-60 years	96.451
60-70 years	96.381
70-80 years	98.983
80-90 years	98.911
90-100 years	98.839
>100 years	98.767

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

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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	76.058
5-10 years	78.173
10-15 years	80.347
15-20 years	82.581
20-25 years	84.878
25-30 years	87.238
30-35 years	89.664
35-40 years	92.158
40-45 years	94.721
45-50 years	97.355
50-55 years	97.279
55-60 years	97.203
60-70 years	97.128
70-80 years	97.053
80-90 years	96.978
90-100 years	96.903
>100 years	96.828

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