Type 2 Diabetes rarely develops overnight.
For many people, it begins years earlier with a condition known as insulin resistance. The challenge is that insulin resistance often develops quietly, without obvious symptoms, while changes are already occurring in the way the body regulates blood sugar.¹ ³
Left unrecognised, insulin resistance can increase the risk of prediabetes, Type 2 Diabetes, cardiovascular disease and other chronic health conditions.³ ⁴
The good news is that early assessment and appropriate testing can help identify potential problems before they become more serious. Understanding insulin resistance, recognising risk factors and knowing when to seek medical advice may help reduce your long-term health risks.
Why Insulin Resistance Matters
Insulin is a hormone produced by the pancreas that helps glucose move from the bloodstream into the body’s cells, where it is used for energy.¹
When someone develops insulin resistance, their cells become less responsive to insulin. As a result, the pancreas must produce increasing amounts of insulin to maintain normal blood sugar levels.¹ ²
Over time, this process can place additional strain on the body and may eventually contribute to:
- Prediabetes
- Type 2 Diabetes
- Heart disease
- Stroke
- Metabolic syndrome
- Fatty liver disease³ ⁴
Early identification of insulin resistance provides an opportunity to make meaningful lifestyle changes before more serious health problems develop.
Why Are More Australians Developing Insulin Resistance?
Insulin resistance is becoming increasingly common due to a combination of lifestyle and genetic factors.⁵
Contributing factors include:
- Rising rates of overweight and obesity
- Sedentary lifestyles
- High consumption of processed foods
- Poor sleep habits
- Chronic stress
- Family history of Type 2 Diabetes
- Ageing populations⁵
While not all risk factors can be controlled, many can be modified through healthy lifestyle changes.
Could You Be at Risk of Insulin Resistance?
You may be at increased risk if you:
- Are overweight or obese
- Carry excess weight around your abdomen
- Have a family history of Type 2 Diabetes
- Have Polycystic Ovary Syndrome (PCOS)
- Have high blood pressure
- Have elevated cholesterol or triglycerides
- Had gestational diabetes during pregnancy
- Are physically inactive
- Have been told your blood sugar levels are elevated⁴ ⁵
Many people with insulin resistance experience no obvious symptoms, which is why regular health assessments can be important.
Common Symptoms of Insulin Resistance
Although symptoms are not always present, some people may experience:
- Fatigue or low energy
- Increased hunger
- Cravings for sugary foods
- Difficulty losing weight
- Weight gain around the waist
- Elevated blood sugar levels
- Darkened patches of skin, particularly around the neck, armpits or groin (acanthosis nigricans)⁴ ⁶
If you are experiencing these symptoms, it may be worthwhile discussing them with your GP.
How Is Insulin Resistance Tested?
One of the most common questions patients ask is whether there is a single test for insulin resistance.
The answer is not always straightforward.
Unlike some medical conditions, insulin resistance is usually assessed through a combination of symptoms, risk factors and blood tests rather than a single diagnostic test.¹ ⁴
Your GP may recommend one or more of the following tests.
HbA1c Blood Test
The HbA1c blood test measures your average blood glucose levels over the previous two to three months.⁷
This test is commonly used to identify:
- Prediabetes
- Type 2 Diabetes
- Long-term blood glucose control
Fasting Blood Glucose Test
A fasting blood glucose test measures blood sugar levels after fasting for at least eight hours.
Abnormal results may suggest impaired glucose regulation or an increased risk of diabetes.⁷
Oral Glucose Tolerance Test (OGTT)
This test measures how effectively your body processes glucose over time.
After drinking a glucose solution, blood samples are taken at specific intervals to assess how your body responds.⁷
Fasting Insulin Blood Test
Some doctors may request a fasting insulin test to assess insulin production.
Elevated insulin levels may indicate that the body is producing more insulin than normal to maintain healthy blood sugar levels.
HOMA-IR Assessment
The Homeostatic Model Assessment of Insulin Resistance (HOMA-IR) combines fasting insulin and fasting glucose measurements to estimate insulin resistance.
This assessment is more commonly used in research and specialist settings.
What Blood Test Indicates Insulin Resistance?
There is no single blood test that definitively diagnoses insulin resistance.
However, several tests may provide valuable information, including:
- HbA1c
- Fasting blood glucose
- Fasting insulin
- Oral glucose tolerance testing⁴ ⁷
Your GP will determine which tests are most appropriate based on your individual circumstances.
Insulin Resistance and PCOS
Insulin resistance is commonly associated with Polycystic Ovary Syndrome (PCOS).
Women with PCOS may experience:
- Irregular periods
- Difficulty conceiving
- Weight gain
- Acne
- Increased risk of developing Type 2 Diabetes⁶
Because of this relationship, women diagnosed with PCOS are often encouraged to have regular health assessments and blood glucose monitoring.
Can Insulin Resistance Be Reversed?
For many people, insulin resistance can be improved through lifestyle changes.³ ⁸
Recommended strategies may include:
- Regular physical activity
- Weight management
- A balanced, nutritious diet
- Improving sleep quality
- Managing stress
- Quitting smoking where applicable⁵ ⁸
In some cases, medications may also be recommended as part of a broader treatment plan.
When Should You See a GP?
Consider speaking with a GP if you:
- Have a family history of Type 2 Diabetes
- Have PCOS
- Are overweight or obese
- Have elevated blood glucose levels
- Experience symptoms that may suggest insulin resistance
- Want to understand your risk of developing diabetes
If you have one or more risk factors for insulin resistance, prediabetes or Type 2 Diabetes, speak with your GP about a Diabetes Risk Assessment. This simple assessment can help identify your personal risk factors and determine whether further testing, such as an HbA1c blood test or blood glucose test, may be appropriate. Early assessment can help identify potential concerns before they progress to prediabetes or Type 2 Diabetes, allowing you to take positive steps towards better long-term health.
Frequently Asked Questions
Can insulin resistance be tested?
Yes. Doctors use a combination of blood tests, symptoms, medical history and risk factors to assess insulin resistance.
How do you test for insulin resistance?
Common tests include HbA1c, fasting blood glucose, fasting insulin and oral glucose tolerance testing.
Can a blood test detect insulin resistance?
Blood tests can identify changes associated with insulin resistance and help assess your future risk of developing Type 2 Diabetes.
Is insulin resistance the same as diabetes?
No. Insulin resistance is not diabetes, but it can increase the risk of developing prediabetes and Type 2 Diabetes over time.
When to Take Action
Insulin resistance often develops silently, but its long-term effects can be significant.
Early identification provides an opportunity to make positive lifestyle changes before more serious health conditions develop. If you have risk factors for insulin resistance, prediabetes or Type 2 Diabetes, speak with your GP about a Diabetes Risk Assessment.
A Diabetes Risk Assessment can help identify your personal risk factors and determine whether further testing is recommended. Early action today may help reduce your risk of developing Type 2 Diabetes in the future.
If you would like to discuss your diabetes risk, book an appointment with your local Qualitas Health GP.
This article is for general information only and is not medical advice. We recommend you consult your GP for personalised healthcare advice.
References
[1] Healthdirect Australia, Insulin and Diabetes. https://www.healthdirect.gov.au/insulin-and-diabetes
[2] Healthdirect Australia, Metabolic Syndrome. https://www.healthdirect.gov.au/metabolic-syndrome
[3] Diabetes Australia, Type 2 Diabetes. https://www.diabetesaustralia.com.au/about-diabetes/type-2-diabetes/
[4] Healthdirect Australia, Pre-diabetes. https://www.healthdirect.gov.au/pre-diabetes
[5] Australian Institute of Health and Welfare (AIHW), Diabetes Risk Factors. https://www.aihw.gov.au
[6] Dietitians Australia, Diabetes and Insulin Resistance. https://dietitiansaustralia.org.au
[7] Healthdirect Australia, Type 2 Diabetes Testing and Diagnosis. https://www.healthdirect.gov.au/type-2-diabetes
[8] Diabetes Australia, Prediabetes. https://www.diabetesaustralia.com.au/about-diabetes/pre-diabetes/
