In this video, Dr. David Perlmutter presents scientific evidence linking elevated blood sugar to shrinkage of the brain’s memory center, the hippocampus. He cites a 2012 Neurology study of 266 cognitively intact adults that measured fasting glucose and hippocampal volume, then re‑examined the participants four years later, finding that higher fasting glucose predicted greater annual hippocampal atrophy even after controlling for age, sex, BMI, hypertension, alcohol use, and smoking. Perlmutter explains the underlying toxic mechanism: excess glucose binds to proteins forming advanced glycation end products (AGEs), which increase gut lining permeability, trigger systemic inflammation, and ultimately damage the hippocampus. He concludes with a practical recommendation to adopt a diet higher in “good” fats and lower in carbohydrates and sugar to reduce inflammation and help preserve hippocampal volume.
Chapters
You've heard me speak extensively about the toxic role of sugar and carbohydrates in terms of the brain. And I've actually gone so far as to say that elevated blood sugar is correlated with shrinkage of your brain. Can you imagine? Why would I say that? Well, let's take a look at some science. Here's a study from the journal Neurology published in 2012, and they looked at 266 intact cognitively individuals. meaning they didn't have dementia. They measured their fasting glucose and they measured the size of the brain's memory center, which is called the hippocampus. They then brought these individuals back 4 years later and again measured the size of their brain's memory center called the hippocampus. And as you see in this next image, the left side and the right side, the hippocampus shrinkage correlates directly with the blood sugar. Higher levels of blood sugar are demonstrated to increase the shrinkage annually of the hippocampus, and the authors concluded that plasma glucose levels are found to be significantly associated with hippocampal atrophy in terms of volume change after controlling for things like age, male or female sex, body mass index, hypertension, alcohol, and smoking. So what the researchers have shown us is that elevation of blood sugar is directly associated with having shrinkage of your brain's memory center. Now, we've tried to figure out what is the exact toxic effect of blood sugar in terms of the brain, and we have some new information to share with you. We now understand that when blood sugar binds to protein, it forms what's called an advanced glycation end product. I don't mean to be too technical, but this AGE Binding of sugar to protein actually turns on inflammation. And the way it does so was just recently discovered, and that is that when we have higher levels of protein binding to sugar, it actually leads to increased leakiness or permeability of the gut lining, and that turns on inflammation. And that's really what damages the brain's memory center most. So again, the take-home message here is to favor a diet That's higher in good fat, that's lower in carbohydrates and sugar, that'll help reduce inflammation and can help preserve your brain's memory center. I'm Dr. David Perlmutter.
