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You may have heard doctors and researchers call Alzheimer’s disease “Type 3 diabetes.” But what does that mean, and why should we care? We all know that diabetes happens when the body has trouble using insulin, the hormone that helps move sugar from our blood into our cells for energy. When this system breaks down, sugar builds up in the blood and can damage many parts of the body.

 

Researchers now see something similar happening in the brain. In people with Alzheimer’s, brain cells often can’t use insulin properly. This leads to less fuel for the brain, more inflammation, and eventually, problems with memory and thinking. Because of this, some experts describe Alzheimer’s as “Type 3 diabetes.” The good news is that healthy lifestyle choices—the same ones that lower diabetes risk—also support brain health:

 

• Stay active. Even gentle walking improves blood flow to the brain.

• Eat smart. Focus on colorful vegetables, healthy fats (like olive oil and nuts), fish, beans, and whole grains. Limit sugar and processed foods.

• Sleep well. Your brain clears out waste while you sleep.

• Keep learning. Reading, puzzles, or trying new hobbies help your brain stay flexible.

• Stay connected. Friendships and social activities protect brain health.

 

While researchers continue to learn more, one thing is clear: what’s good for your heart and blood sugar is also good for your brain. By making small, steady changes, you can lower your risk and give your memory the best chance to stay sharp.