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Studies show that prediabetes is associated with increased risks of death and cardiovascular events, with an additional 7.36 deaths and 8.75 heart disease cases per 10,000 person-years over 6.6 years. Prediabetes should not be ignored as it is a diabetes risk factor that can affect major organs, causing serious complications including nerve damage and amputation.
What Does Prediabetes Mean?
Prediabetes means that your blood sugar level is higher than normal, but not high enough to be diagnosed as Type 2 diabetes. It is an early warning sign that the body is starting to have difficulty using insulin properly.
Although prediabetes may not cause obvious symptoms, it should not be ignored. Without proper care, prediabetes can increase the risk of developing Type 2 diabetes in the future. It may also be linked to other health concerns such as high blood pressure, high cholesterol, heart disease and stroke.
The good news is that prediabetes is a stage where early action can make a difference. With lifestyle changes, regular health checks and medical guidance where needed, many people can improve their blood sugar levels and reduce their risk of progressing to Type 2 diabetes.
Normal Blood Sugar Levels vs Prediabetes
Prediabetes is usually diagnosed through blood tests. These tests help your doctor assess how your body manages blood sugar.
| Diagnostic Test | Normal Range | Prediabetes Range | Diabetes Range |
|---|---|---|---|
| Fasting Plasma Glucose (FPG) | < 5.6 mmol/L | 5.6 to 6.9 mmol/L | ≥ 7.0 mmol/L |
| Oral Glucose Tolerance Test (OGTT) 2-hour reading | < 7.8 mmol/L | 7.8 to 11.0 mmol/L | ≥ 11.1 mmol/L |
| HbA1c | < 5.7% | 5.7% to 6.4% | ≥ 6.5% |
These ranges are provided as a general guide. Your doctor will interpret your results based on your overall health, symptoms, risk factors and medical history. In some cases, a repeat blood test may be needed to confirm the diagnosis.
Signs and Symptoms of Prediabetes
Most people with prediabetes do not show symptoms. In some cases, signs may include:
- Increased appetite
- Unexplained weight loss
- Increased BMI (Body Mass Index)
- Fatigue or weakness
- Excessive sweating
- Blurred vision
- Slow-healing wounds or bruises
- Recurrent skin infections or gum bleeding
What Causes Prediabetes?
Hyperglycemia triggers pancreatic beta cells to produce and release insulin. Prolonged exposure to high insulin levels reduces insulin receptor responsiveness, impairing glucose uptake into cells.
When insulin receptors are impaired, hyperglycemia worsens, maintaining metabolic dysfunction and eventually leading to type 2 diabetes and metabolic syndrome.
In prediabetes, this process is less advanced but represents an early stage of potentially harmful metabolic changes.
Risk Factors for Prediabetes
Risk factors include:
- Overweight or obesity
- Family history of diabetes (parents or siblings)
- Lack of physical activity
- Health conditions such as high blood pressure or high cholesterol
- History of gestational diabetes
- Polycystic Ovary Syndrome (PCOS)
Good news: Even if unmodifiable factors like age, ethnicity, or family history exist, lifestyle changes—healthy diet, weight management, and regular exercise—can drastically reduce the risk of insulin resistance and prediabetes.
Read more: Insulin Resistance Nutrition
What Blood Tests Are Used to Diagnose Prediabetes?
Prediabetes may be diagnosed using one or more of the following blood tests:
- Fasting Plasma Glucose Test: This test measures your blood sugar after fasting for at least 8 hours. It is commonly done during routine health screening.
- HbA1c Test: This test reflects your average blood sugar level over the past 2 to 3 months. It does not usually require fasting.
- Oral Glucose Tolerance Test (OGTT): This test measures how your body responds to sugar. Your blood sugar is checked before and after drinking a glucose solution. It may be recommended when your doctor needs a clearer picture of how your body processes glucose.
How is Prediabetes Managed?
The good news: lifestyle changes can prevent or even reverse prediabetes. Steps include:
- Increase physical activity (≥150 min/week)
- Reduce calorie intake and follow a healthier diet
- Lose 5–10% of body weight
- Stop or reduce smoking
- Manage stress
Medications like Metformin may also be recommended to manage prediabetes.
Read more: How to Reduce Blood Sugar.
Can Prediabetes be Reversed?
Yes. With appropriate lifestyle interventions, many people can return blood glucose to normal ranges and reduce the risk of developing type 2 diabetes.
How to Prevent Prediabetes
Three-part strategy:
- Lose weight
- Increase physical activity
- Eat a healthier diet
Incorporating these habits into daily life can significantly reduce prediabetes risk and promote overall health.
Read more: Foods to Avoid for Diabetes.
Schedule an Appointment at Pantai Hospital
Empower yourself with small but impactful lifestyle changes. Adjust your diet, increase activity, or seek timely medical guidance—each step today is an investment in your future health. Protect yourself not only from diabetes but foster a life of wellness and vitality.
Consult your doctor, get support from loved ones, and start your journey toward better health.
Contact us to schedule a diabetes screening or visit your nearest Pantai Hospital for consultation.
