Why Alzheimer’s Is Called “Type 3 Diabetes” — And What That Means for Your Brain Right Now

By Dr. Marie Starling | The Healing Center Denver  Functional Medicine Doctor | Root Cause. Real Healing. You're Not Broken. Reading time: 8 minutes Category: Brain Health | Hormones & Metabolism | Gut-Brain  The Diagnosis Nobody Talks About Until It's Too Late You're standing in the kitchen. You came in here for something. What was it? You're mid-sentence and the word you need just... disappears. You know it. It's right there. But you can't reach it. You've blamed stress. You've blamed aging. You've blamed being too busy. But here's what most doctors won't tell you: these aren't just annoyances. They can be early warning signals from a brain that is losing its ability to use fuel — years, sometimes decades, before anyone would call it dementia. There is a name for this process. Researchers call it Type 3 Diabetes. And understanding it might be the most important thing you do for your long-term health. So What Exactly Is Type 3 Diabetes? You already know about Type 1 and Type 2 diabetes — both involve the body's inability to properly manage insulin and blood sugar. Type 3 diabetes is different. It describes a condition where insulin resistance develops specifically inside the brain, impairing your neurons' ability to take in and use glucose for energy. Here's the piece that changes everything: your brain produces its own insulin. It has its own insulin receptors. It runs its own metabolic system — somewhat independently of your pancreas and bloodstream. When that system breaks down, your neurons start starving. Not because there isn't enough sugar in your blood — your fasting glucose could look perfectly...