Your blood sugar is normal. Your insulin isn't.
August 25, 2026
Your blood sugar is normal. Your insulin isn't.
The damage starts years before glucose ever rises. There is a test almost nobody orders that catches it early.
Your fasting glucose was 92. Your A1C was 5.4. Your doctor said your blood sugar looks great, and technically that is true.
What nobody measured is how hard your body is working to keep those numbers there.
The Number Behind the Number
Insulin is the hormone that moves sugar out of your bloodstream and into cells. When cells stop responding to it well, the pancreas compensates by producing more. And more. And more.
For years, this works. Glucose stays in range because insulin is doing double or triple the normal amount of work to keep it there. Your labs look clean while the underlying system is straining badly.
Eventually the pancreas cannot keep pace and glucose starts to climb. That is the point at which most people get diagnosed with prediabetes. But the process that got them there had been running for a decade or more, invisible on every panel they had done.
What High Insulin Does While You Wait
This is the part I wish more people understood. Elevated insulin is not a harmless placeholder before diabetes. It causes damage on its own.
It drives inflammation, which sits underneath most chronic disease including the pain conditions many of you are managing.
It blocks fat burning. Insulin is a storage hormone, and while it is elevated your body will not release fat for fuel no matter how carefully you eat. This is why people who are doing everything right cannot lose weight and conclude they must be broken.
It contributes to fatigue after meals, the mid-afternoon collapse that sends people looking for coffee or sugar, which restarts the cycle.
And it is closely tied to cardiovascular risk, more so than cholesterol in many analyses.
The Test to Ask For
Fasting insulin. It is inexpensive, widely available, and almost never ordered.
Most labs list a reference range up to about 25 uIU/mL, which is far too permissive. In my practice I want to see fasting insulin under 8, and ideally around 5. A patient with normal glucose and a fasting insulin of 18 is not healthy. They are compensating.
Even better is running fasting insulin and fasting glucose together, which lets you calculate a HOMA-IR score, a direct estimate of insulin resistance. Ask your doctor for both drawn at the same time.
What This Means for You
Order fasting insulin with your next panel. If your doctor resists, ask what it would cost to add. It is usually trivial.
Eat protein and fat first at every meal. Same food, different order. Starting a meal with vegetables and protein rather than bread measurably blunts the insulin response.
Walk after you eat. Ten to fifteen minutes. Muscle contraction pulls glucose out of the blood without requiring insulin at all, and it is the single highest-return habit on this list.
Stop drinking your carbohydrates. Juice, sweetened coffee, and soda deliver sugar with nothing to slow absorption. This includes the smoothie you think is healthy.
Sleep, because it is a blood sugar intervention. A few nights of poor sleep measurably worsens insulin sensitivity in otherwise healthy people.
Consider magnesium and chromium. Both support insulin signaling, and magnesium deficiency is common in people with insulin resistance.
The Bottom Line
Normal glucose does not mean the system is healthy. It means the compensation is still working. Get fasting insulin measured, find out what your body is actually doing to hold that number steady, and act on it while the problem is still fully reversible.
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Note: This newsletter is for education. Do not change or stop any medication without speaking with your doctor.
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