Why Insulin Resistance Undermines Cancer Treatment — and What to Do About It
Insulin resistance is one of the most overlooked factors influencing cancer outcomes. While oncology focuses on tumour genetics, drug targets, and immune checkpoints, a growing body of evidence suggests that the metabolic environment surrounding the tumour can quietly determine whether treatments work—or fail. This is not about replacing standard cancer therapy. It’s about understanding why the same drug can produce dramatically different outcomes in different patients, even with identical tumour markers. What Is Insulin Resistance (and Why It Matters in Cancer)? Insulin resistance occurs when cells no longer respond effectively to insulin, forcing the body to produce higher levels of insulin to maintain normal blood glucose. This leads to: Chronic hyperinsulinaemia Elevated IGF-1 signalling Increased inflammation Altered immune cell function All of these are biologically relevant to cancer. Cancer does not grow in isolation. It grows inside a metabolic system. How Insulin Resistance ...