03/11/2026
It's progressive.
Type 2 diabetes rarely develops overnight.
Research shows that insulin resistance and elevated insulin levels can appear 10–15 years before a diabetes diagnosis.
During this early phase, the body is already working harder to manage blood glucose.
Over time, this metabolic strain may contribute to rising blood sugar, prediabetes, and eventually type 2 diabetes.
Understanding this progression is important because it highlights the value of early metabolic awareness and lifestyle intervention.
Education allows individuals and clinicians to recognize risk earlier and support informed decisions about metabolic health.
Citation:
Trajectories of glycaemia, insulin sensitivity, and insulin secretion before diagnosis of type 2 diabetes: an analysis from the Whitehall II study, Tabák, Adam G et al., The Lancet, Volume 373, Issue 9682, 2215 - 2221
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