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Health Markers
Fasting Insulin
A blood test of your insulin level after not eating, a window into metabolic health.
Fasting insulin measures how much insulin your body needs at rest. High fasting insulin can show up years before blood sugar problems do, making it a useful early signal of insulin resistance. It is one of the labs Dr. Berry highlights for understanding your metabolic health.
This definition is for general education and is not medical advice. Talk to your own physician before making changes, especially if you take medication. See our Medical Disclaimer.