Fasting Insulin: The Early Warning Sign of Insulin Resistance
Research shows fasting insulin and HOMA-IR can identify insulin resistance and cardiovascular risk years before blood sugar becomes abnormal. Elevated insulin is strongly linked to metabolic syndrome, hypertension, and heart disease, even in individuals with “normal” glucose levels. At Via Nova Health, Dr. Jeff Matz, DC, MS, emphasizes early detection through comprehensive metabolic testing to uncover hidden risk and guide targeted lifestyle interventions before disease develops. For more information, contact us or request an appointment online.
In your annual physical, insulin is often the “forgotten hormone,” overshadowed by its more famous partner, blood glucose. Most patients walk away from their physical feeling relieved because their fasting glucose was “normal,” unaware that their body might be working ten times harder than it should to maintain that stability. The truth is that testing glucose without testing insulin is like looking at the speed of a car without checking how hard the engine is revving; you might be doing 60 miles per hour, but if your engine is redlining at 8,000 RPMs, you are headed for a breakdown. Insulin is the master anabolic hormone, responsible for ushering energy into your cells and signaling the body to store fat. When we only test glucose, we are looking at a “late-stage” marker. Your blood sugar is often the very last thing to break, usually staying within the “normal” range for a decade or more while your fasting insulin levels are quietly climbing behind the scenes to compensate for a processed diet and sedentary lifestyle.
This silent climb is known as Hyperinsulinemia, and it is the true driver behind the “metabolic middle” most people struggle with in their 40s and 50s. High circulating insulin acts like a chemical lock on your fat cells; it sends a constant signal to the body that “fuel is available,” which effectively shuts down your ability to burn stored body fat for energy. This is why you can be in a calorie deficit and still feel like you aren’t losing weight; if your insulin is high, the “fat-burning furnace” is physically turned off. Beyond weight, chronically high insulin is a powerful growth signal that can lead to skin tags, darkened skin patches (acanthosis nigricans), and even the proliferation of smooth muscle cells in your arteries, contributing to high blood pressure and cardiovascular disease. By the time your fasting glucose finally crosses the threshold into “Pre-Diabetes,” your insulin has likely been elevated and struggling for years, meaning we missed the best window for prevention.
To truly understand your metabolic health, you must move beyond the basic Glucose or A1c test and ask for a Fasting Insulin test to calculate your HOMA-IR (Homeostatic Model Assessment for Insulin Resistance). A “normal” lab range for insulin might go as high as 25 uIU/mL, but in the world of optimal health, experts look for a fasting insulin level below 6 or 7. If your insulin is in the double digits, your “engine” is working too hard, even if your blood sugar looks perfect. Correcting this doesn’t require a pharmaceutical intervention for most; it requires a shift in “Nutrient Timing” and “Macro-Ordering.” By leading your meals with protein and fiber, engaging in short bursts of muscle-contracting exercise like a 10-minute walk after dinner, and utilizing tools like Time-Restricted Feeding, you can lower the demand on your pancreas and “sensitize” your cells to insulin again. When you fix the insulin signal, you aren’t just managing a number on a lab report; you are unlocking your body’s ability to burn fat, stabilize your energy, and protect your long-term health.
Check Out Our 5 Star Reviews
Send Text
How May I Help You?