Insulin (Fasting)

Key Aspects of Fasting Insulin:

• Purpose: It helps identify insulin resistance—where cells don't respond efficiently to insulin—often before blood sugar levels spike, allowing for earlier intervention with lifestyle changes.
• Normal vs. Optimal Ranges: While "normal" lab ranges can vary, many experts consider the optimal range for fasting insulin to be between 3 to 10 $\mu$IU/mL.
• High Levels (Hyperinsulinemia): High fasting insulin indicates that the body is working too hard to maintain normal glucose levels.
• Low Levels: Low levels can be normal for some, but in individuals with diabetes, they may indicate the pancreas is exhausting its ability to produce insulin.
• Preparation: The test requires an 8 to 12 hour fast, during which only water is allowed, and requires pausing biotin supplements for 24 hours.

Improving Fasting Insulin Levels:

• Dietary Changes: Adopting a Mediterranean diet and reducing refined carbohydrates can help lower insulin levels.
• Exercise: Regular physical activity, particularly, HIIT, strength training, and Zone 2 cardio, improves cellular insulin sensitivity, reducing the need for high insulin levels.
• Lifestyle Factors: Quality sleep (7-9 hours) and managing stress are crucial for hormonal balance.
• Intermittent Fasting: This practice helps lower insulin resistance by providing the pancreas with extended periods of rest.