A good fasting insulin level generally falls between 5 and 15 μU/mL when measured using commercial assays, but ideally should be lower than 12 μU/mL when using more sensitive assays.
Understanding Fasting Insulin Levels
Fasting insulin refers to the level of insulin in your blood when you haven't eaten for at least eight hours. Measuring it can provide insights into insulin resistance and how well your body is managing blood sugar.
Normal Ranges for Fasting Insulin
| Assay Type | Normal Range (μU/mL) |
|---|---|
| Commercial Assays | 5 - 15 |
| More Sensitive Assays | < 12 |
Reference: Measurement of Serum Insulin
Why Fasting Insulin Matters
Fasting insulin levels can be used to assess insulin resistance. Elevated levels may indicate that your body isn't responding efficiently to insulin, potentially leading to type 2 diabetes and other health issues.
Factors Influencing Fasting Insulin
Several factors can influence fasting insulin levels:
- Diet: High-carbohydrate diets can lead to higher insulin levels.
- Physical Activity: Lack of exercise can contribute to insulin resistance.
- Weight: Being overweight or obese is often associated with elevated insulin levels.
- Genetics: Genetic predisposition can play a role in insulin sensitivity.
What to Do if Your Fasting Insulin is High
If your fasting insulin is high, consider the following:
- Consult a Healthcare Provider: Discuss your results with a doctor for personalized advice.
- Dietary Changes: Reduce your intake of refined carbohydrates and sugary foods.
- Increase Physical Activity: Engage in regular exercise to improve insulin sensitivity.
- Weight Management: Losing weight, if you're overweight, can significantly improve insulin function.
