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Normal Range for Fasting Blood Sugar Levels

Learn about the normal range for fasting blood sugar levels and what your results indicate. Understand how this test helps in diagnosing diabetes, monitoring health, and guiding lifestyle or treatment decisions.

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Written by Dr. Mohammed Kamran

Reviewed by Dr. J T Hema Pratima MBBS

Last updated on 14th Aug, 2025

Introduction

Maintaining healthy blood sugar levels is crucial for overall well-being, especially for preventing and managing diabetes. If you've ever had a blood sugar test or are curious about what constitutes a "normal" fasting blood sugar level, this guide will help you understand the basics in simple terms.

What Are Fasting Blood Sugar Levels?

Fasting blood sugar (or fasting blood glucose) refers to the amount of sugar (glucose) in your blood after not eating or drinking anything except water for at least 8 hours. This test is commonly used to check for diabetes or prediabetes.

Consult a Diabetologist for the best advice

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What Is the Normal Range?

The normal range for fasting blood sugar levels is:

  • Normal: 70–99 mg/dL

  • Prediabetes (impaired fasting glucose): 100–125 mg/dL

  • Diabetes: 126 mg/dL or higher on two separate tests

If your fasting blood sugar falls between 100–125 mg/dL, it indicates prediabetes, meaning you have a higher risk of developing diabetes. A level of 126 mg/dL or above typically confirms diabetes.

Why Is This Important?

Maintaining blood sugar within the normal range helps prevent:

  • Diabetes-related complications (nerve damage, kidney disease, vision problems).

  • Energy imbalances (fatigue, dizziness, or excessive hunger).

  • Heart disease and stroke risk.

Symptoms of Abnormal Blood Sugar Levels

Recognizing the signs of abnormal blood sugar levels can help you take timely action to protect your health.

High Blood Sugar (Hyperglycaemia) Symptoms:

  • Increased thirst and frequent urination

  • Fatigue and blurred vision

  • Slow-healing wounds

  • Unexplained weight loss

Low Blood Sugar (Hypoglycaemia) Symptoms:

  • Shakiness, sweating, or dizziness

  • Confusion or irritability

  • Rapid heartbeat

  • Extreme hunger

If you experience these symptoms frequently, consult a doctor for proper testing.

What Affects Fasting Blood Sugar Levels?

Several factors influence blood sugar levels, including:

  • Diet (high sugar or refined carbs intake)

  • Lack of physical activity

  • Stress and poor sleep

  • Certain medications (steroids, diuretics)

  • Medical conditions (PCOS, thyroid disorders)

How to Maintain Healthy Blood Sugar Levels?

Maintaining healthy blood sugar levels is essential for preventing diabetes and supporting overall well-being.

1. Eat a Balanced Diet

  • Choose whole grains, lean proteins, and healthy fats.

  • Limit sugary drinks, processed foods, and refined carbs.

  • Include fibre-rich foods (vegetables, fruits, legumes).

2. Stay Active

  • Exercise regularly (30 minutes of walking, cycling, or yoga daily).

  • Strength training helps improve insulin sensitivity.

3. Monitor Your Blood Sugar

  • If you have prediabetes or diabetes, regular testing is essential.

  • Apollo 24|7 offers easy blood sugar testing and consultations with specialists.

4. Manage Stress & Sleep Well

  • Practice relaxation techniques (meditation, deep breathing).

  • Aim for 7–8 hours of quality sleep.

5. Stay Hydrated

Drink plenty of water to help regulate blood sugar.

When to See a Doctor?

Consult a doctor:

  • If your fasting blood sugar is consistently above 100 mg/dL.

  • If you experience symptoms of high or low blood sugar.

  • If you have a family history of diabetes.

Early detection and lifestyle changes can prevent or delay diabetes and its complications.

Final Thoughts

Understanding your fasting blood sugar levels is the first step toward a healthier life. Small changes in diet, exercise, and stress management can make a big difference. If you suspect any irregularities, don’t wait; get tested and seek professional advice.

Consult a Diabetologist for the best advice

Dr Syed Mateen Pasha, General Physician

Dr Syed Mateen Pasha

General Physician

2 Years • MBBS

Bengaluru

PRESTIGE SHANTHINIKETAN - SOCIETY CLINIC, Bengaluru

400

60 Cashback

Dr. Dhanraj K, General Physician/ Internal Medicine Specialist

Dr. Dhanraj K

General Physician/ Internal Medicine Specialist

25 Years • MBBS, MD Internal Medicine - Osmania Medical College, Hyderabad

Hyderabad

Apollo Hospitals Jubilee Hills, Hyderabad

recommendation

91%

(375+ Patients)

1000

1000

No Booking Fees

Dr Bhargav Vuppumalla, General Physician/ Internal Medicine Specialist

Dr Bhargav Vuppumalla

General Physician/ Internal Medicine Specialist

5 Years • MBBS MD GENERAL MEDICINE

Bengaluru

Apollo Medical Center, Marathahalli, Bengaluru

550

83 Cashback

Dr. Zulkarnain, General Physician

Dr. Zulkarnain

General Physician

2 Years • MBBS, PGDM, FFM

Bengaluru

PRESTIGE SHANTHINIKETAN - SOCIETY CLINIC, Bengaluru

400

40 Cashback

Consult a Diabetologist for the best advice

Dr Syed Mateen Pasha, General Physician

Dr Syed Mateen Pasha

General Physician

2 Years • MBBS

Bengaluru

PRESTIGE SHANTHINIKETAN - SOCIETY CLINIC, Bengaluru

400

60 Cashback

Dr. Dhanraj K, General Physician/ Internal Medicine Specialist

Dr. Dhanraj K

General Physician/ Internal Medicine Specialist

25 Years • MBBS, MD Internal Medicine - Osmania Medical College, Hyderabad

Hyderabad

Apollo Hospitals Jubilee Hills, Hyderabad

recommendation

91%

(375+ Patients)

1000

1000

No Booking Fees

Dr.rohit Afroz, General Physician

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General Physician

2 Years • MBBS.,MD (General Medicine)

Hyderabad

Apollo Sugar Clinic alkapuri colony, Hyderabad

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90 Cashback

600

No Booking Fees

Dr Bhargav Vuppumalla, General Physician/ Internal Medicine Specialist

Dr Bhargav Vuppumalla

General Physician/ Internal Medicine Specialist

5 Years • MBBS MD GENERAL MEDICINE

Bengaluru

Apollo Medical Center, Marathahalli, Bengaluru

550

83 Cashback

Dr. Zulkarnain, General Physician

Dr. Zulkarnain

General Physician

2 Years • MBBS, PGDM, FFM

Bengaluru

PRESTIGE SHANTHINIKETAN - SOCIETY CLINIC, Bengaluru

400

40 Cashback

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