Diabetes - Bloody Good
Diabetes

Fasting Insulin

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.

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Fasting Insulin

Experiencing weight changes, unexplained fatigue, or diabetes-related concerns and want to assess how well your insulin is functioning for optimal metabolism?

Overview

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

Symptoms

You may benefit from this test if you experience:
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

Purpose

Essential for individuals with metabolic syndrome, insulin resistance risk, diabetes prevention, or anyone needing comprehensive insulin and metabolic assessment.

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.
Fasting Insulin

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How it works

What to expect

We want you to feel bloody good—inside and out. Regular testing isn’t just about checking your current health; it helps you spot abnormal values you might not know about.

1

Book your referral

Choose the testing that suits your goals. After ordering, you will receive your referral by email.

2

Collect your sample

Easy sample collection at one of our 4000+ partner collection centres throughout Australia. Find nearest

3
Receive your results

Receive your results

View your lab results and receive a personalised review from the secure Bloody Good platform.

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