What is Type 3 diabetes?

Type 3 diabetes is a term used to describe insulin resistance in the brain, which may contribute to Alzheimer’s disease. It is not an official diagnosis but is widely discussed in research exploring how impaired glucose metabolism affects memory, cognition, and long-term brain health.

How does insulin resistance affect the brain?

When the brain becomes resistant to insulin, neurons struggle to absorb glucose, their primary energy source. This can lead to reduced cognitive function, increased inflammation, and oxidative stress—factors commonly associated with memory loss and neurodegenerative conditions like Alzheimer’s disease.

What is Gary Brecka’s approach to Type 3 diabetes?

Gary Brecka focuses on improving metabolic health through nutrition, lifestyle changes, and targeted supplementation. His approach aims to stabilize blood sugar, reduce inflammation, and support brain energy metabolism. Tracking long-term glucose control—such as using an A1C calculator to convert A1C to estimated average glucose (eAG)—can help maintain cognitive function and reduce the risk of neurodegeneration over time.

Is Type 3 diabetes the same as Alzheimer’s disease?

Type 3 diabetes is not the same as Alzheimer’s but is often used to describe the link between insulin resistance in the brain and Alzheimer’s-related changes. Many researchers believe impaired insulin signaling may play a key role in the development and progression of cognitive decline.

Can lifestyle changes help reduce the risk of Type 3 diabetes?

Yes, lifestyle changes like maintaining stable blood sugar levels, eating a balanced diet, exercising regularly, and improving insulin sensitivity may support brain health. These habits can help reduce inflammation and metabolic dysfunction, which are linked to cognitive decline and Alzheimer’s risk.

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Diets | Health | Nutrition

Gary Brecka on Type 3 Diabetes: Alzheimer’s & Brain Insulin
ByKen Gri, Founder of DiabetesKnow May 17, 2025August 28, 2026

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