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Doctor's Assessment Included

Every result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP.

Metabolic

Insulin (Fasting)

Insulin sensitivity naturally decreases with age. Monitoring fasting insulin supports early intervention and metabolic health maintenance in later years.

Results within 5–7 working days after your blood draw (estimate)

What It Measures

This test measures baseline insulin levels in a fasting state. Elevated fasting insulin often precedes elevated fasting glucose, making it an early indicator of metabolic dysfunction.

Why It Matters

Fasting insulin can detect insulin resistance years before diabetes develops. Early detection allows for lifestyle interventions that may prevent progression. Consult your healthcare provider for personalised advice.

When to Test

Testing may be recommended if you have risk factors for metabolic syndrome, PCOS, family history of diabetes, or unexplained weight gain, especially around the midsection.

Symptoms

Low Levels

Very low fasting insulin may indicate type 1 diabetes or advanced pancreatic insufficiency. Symptoms may include weight loss, excessive thirst, and frequent urination.

High Levels

Elevated fasting insulin may be associated with insulin resistance, weight gain, fatigue, sugar cravings, and difficulty losing weight. It is a key early marker of metabolic dysfunction.

Recommendations

Male

If Low

Low fasting insulin is normal and indicates good insulin sensitivity.

If High

Elevated fasting insulin indicates insulin resistance. Consider lifestyle changes and metformin.

Female

If Low

Low fasting insulin is normal and indicates good insulin sensitivity.

If High

Elevated fasting insulin indicates insulin resistance or PCOS. Consider lifestyle changes.

Lifestyle Tips

Regular exercise, especially resistance training and aerobic activity, can improve insulin sensitivity. Reduce refined carbohydrates, prioritise protein and fibre, and maintain a healthy weight.

Frequently Asked Questions

What is insulin resistance?
Insulin resistance occurs when cells respond less effectively to insulin, causing the pancreas to produce more. It is an early stage of metabolic dysfunction that can lead to type 2 diabetes.
Can exercise lower fasting insulin?
Yes, regular physical activity, particularly resistance and aerobic exercise, can improve insulin sensitivity and lower fasting insulin levels over time.
Is fasting insulin better than fasting glucose for early detection?
Fasting insulin often rises before glucose does, making it potentially more sensitive for early detection of metabolic issues. Your healthcare provider can advise which tests are most appropriate.

Test Products

This marker is included in the following test panels.