Insulin resistance sits quietly behind many of the conditions people are told to manage one at a time — type 2 diabetes, fatty liver, stubborn blood pressure, PCOS, and the weight shifts that often accompany perimenopause and menopause. This section explains what metabolic syndrome actually is, how insulin signaling breaks down over time, and why a cluster of seemingly unrelated symptoms often traces back to the same underlying process. It's written for readers who want to understand what's happening in their body before deciding what to do about it.