Experiencing weight changes, unexplained fatigue, or diabetes-related concerns and want to assess how well your insulin is functioning for optimal metabolism?
The Fasting Insulin Blood Test measures insulin levels after not eating for at least 8 hours. High fasting insulin may be linked to insulin resistance, pre-diabetes, or metabolic syndrome, while healthy levels support balanced blood sugar and energy control.
You will be emailed a referral to take to your local collection centre. If you ever have any questions, we're here to help.
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How does it work?
Bloody Good is a single portal for ordering, tracking, and reviewing on-demand health testing. Get started with three simple steps:
1
Book your test
Choose the testing that suits your goals. After ordering, you will receive your referral by email.
2
Collect your samples
Have your sample collected at one of our 4000+ partner collection centres.
3
View your results
View your lab results and receive a personalised review from the secure Bloody Good platform.
Think of insulin as your body's key that unlocks your cells so they can use sugar for energy. The Fasting Insulin test measures how much of this key your body produces when you haven't eaten for 8-12 hours, giving us a clear picture of your metabolic health. Just like checking your car's engine when it's idling, this test reveals how well your insulin system works at rest, without the influence of recent meals.
This test is especially valuable because it can catch problems early, often years before diabetes develops. When your fasting insulin levels are too high, it usually means your body is working overtime to keep your blood sugar normal – a condition called insulin resistance that can lead to weight gain, fatigue, and eventually diabetes. Whether you have a family history of diabetes, struggle with unexplained weight gain, or simply want to stay ahead of potential metabolic issues, this test provides crucial insights that can help you make informed decisions about your health and catch problems while they're still manageable.
Reviewed by Dr. Vu Tran Bloody Good’s Chief Medical Officer
You may benefit from the Fasting Insulin Blood Test
Essential for individuals with metabolic syndrome, insulin resistance risk, diabetes prevention, or anyone needing comprehensive insulin and metabolic assessment.
Blood sugar spikes after eating
Feeling tired after eating
Intense sugar cravings
Difficulty losing weight despite diet and exercise
Abdominal weight gain
Family history of diabetes
PCOS with metabolic symptoms
How to prepare
Fast for 8-12 hours before testing. Take sample before 10am. Drink only water during fasting period. Avoid training 24-48 hours prior to test.
Understanding results
Results show fasting insulin levels compared to normal ranges. Elevated levels may indicate insulin resistance requiring lifestyle changes, monitoring, or medical treatment.
After the test
Address abnormal insulin through lifestyle modifications, dietary changes, exercise, weight management, and insulin sensitizing medications if indicated. Work with endocrinologists for complex cases.
Frequently Asked Questions
Fasting insulin measures insulin levels after not eating for 8-12 hours; it helps detect insulin resistance before glucose levels become abnormal.
Elevated fasting insulin typically indicates insulin resistance, where cells don't respond properly to insulin, increasing diabetes and metabolic syndrome risk.
Symptoms may include weight gain, difficulty losing weight, fatigue, cravings for carbohydrates, and darkened skin patches (acanthosis nigricans).
Causes include obesity, sedentary lifestyle, genetics, certain medications, hormonal disorders, and chronic inflammation.
Treatment includes lifestyle modifications (diet, exercise, weight loss), insulin sensitizing medications, and management of underlying conditions.
Yes, early insulin resistance can often be improved or reversed through lifestyle changes, weight loss, and appropriate medical treatment.
You will be emailed a referral to take to your local collection centre. If you ever have any questions, we're here to help.
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Bloody Good is a single portal for ordering, tracking, and reviewing on-demand health testing.
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Having seen the GP regularly, I thought I had everything covered. I had no idea I had Type II diabetes as I was symptomless. Now I can manage it before it gets really bad. I never would have caught it this early if I hadn't used Bloody Good.
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Frequently Asked Questions
Find answers to common questions about our products and services.
Most collection centres accept walk-ins. Some may require a booking - check details when you click on your chosen location.
If your test needs fasting, we’ll include that in your instructions after you order. Fasting usually means no food for 8–12 hours, but water is fine.
Just your pathology referral form (we email it to you)
Of course. Just maybe don’t bring the friend who faints at the sight of blood.
They’re the highly trained professionals who take your blood sample - with a steady hand and a sharp needle. They love blood, but don’t worry… they’re not vampires. Just legends who make blood tests quick, clean, and (almost) painless.
Some of our tests include Urine, Stool, Saliva and more. Each test will have a clear description on what sample you will need to give and instructions on how.
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