Insulin Resistance: How to Be 'Normal' on Paper and Still Be at Risk

Insulin resistance is the metabolic condition that precedes type 2 diabetes by a decade or more. It is also the underlying driver of obesity, PCOS, fatty liver disease, and a significant proportion of cardiovascular events. An estimated 40% of the Swiss adult population has some degree of insulin resistance.

Most of them will never be told.

The flaw in the standard test

Standard check-ups measure fasting glucose. If it is above 7.0 mmol/L, you have diabetes. Between 5.6 and 7.0, you have "impaired fasting glucose." Below 5.6, you are told everything is fine.

But this binary approach misses the most important window. In the decade before fasting glucose rises, something else is happening: your pancreas is compensating. It is producing more and more insulin to achieve the same glucose control. Your blood sugar stays normal. Your insulin is not.

What HOMA-IR actually tells you

HOMA-IR (Homeostatic Model Assessment of Insulin Resistance) is calculated from a simple formula using fasting glucose and fasting insulin. A HOMA-IR above 1.9 indicates early insulin resistance. Above 2.9 indicates significant resistance that warrants clinical intervention.

Crucially, your fasting glucose can be perfectly normal — say, 4.8 mmol/L — while your HOMA-IR reveals insulin resistance that has been developing for years. This is the test that catches what the standard panel misses.

Why this matters beyond diabetes

Insulin resistance is not just a diabetes story. Research from the Stanford Prevention Research Center shows that individuals with elevated HOMA-IR have:

• 2.3× higher risk of major cardiovascular events
• 1.9× higher risk of non-alcoholic fatty liver disease
• Significantly elevated risk of hormone imbalance, including low testosterone and elevated oestrogen in men
• Higher baseline inflammation, as measured by hsCRP and IL-6

What intervention looks like

The good news: early insulin resistance is highly reversible. The interventions are not pharmaceutical — they are metabolic. Strategic time-restricted eating, resistance training, reducing refined carbohydrates, and improving sleep quality have all demonstrated measurable HOMA-IR improvement in clinical trials.

But you cannot intervene on what you cannot measure. And the standard check-up does not measure it.