Insulin resistance
Insulin resistance is the earliest and most reversible stage of metabolic disease, and fasting insulin and HOMA-IR find it years before glucose moves.
Glucose stays normal because insulin rises to keep it there. That compensation can run for a decade, which is why fasting glucose and HbA1c are the last things to move rather than the first. Fasting insulin and HOMA-IR describe the compensation itself, and they are the difference between correcting this and eventually managing it.
Sustained refined carbohydrate and fructose load. Low muscle mass and insufficient resistance training, since muscle is the primary site of glucose disposal. Visceral adiposity. Chronic cortisol elevation. Short or fragmented sleep, which measurably reduces insulin sensitivity within days. Magnesium and vitamin D insufficiency. And genetic loading.
Resistance training, which improves glucose disposal faster than any dietary change alone. Zone 2 conditioning for mitochondrial capacity. Carbohydrate quality and timing rather than blanket restriction. Adequate protein. Sleep extension, frequently the largest single lever. Magnesium and vitamin D repletion where deficient. Medication only where the picture warrants it.
Fasting insulin and HOMA-IR as the primary markers. Continuous glucose monitoring, to show your actual postprandial response rather than a population average. HbA1c and fasting glucose for context. Triglyceride to HDL ratio. hs-CRP. And ApoB, since insulin resistance and cardiovascular risk travel together.
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