Robert Lustig explains how fructose damages cell membranes using a balloon analogy. When stress stretches a membrane too far, it loses integrity and the cell dies. Fructose drives these negative changes to membrane structure.
Chapters
You all blow up balloons when you were a kid, like for birthday party. So let's blow up a balloon. Okay? You blow it up, gets really stretched, right? Try to poke it with a finger. It just comes straight back, right? Now poke it with a pin. Poof. Okay, fine. So let's take another balloon. We're going to blow it up to the same level, okay? We're going to put it in the corner of our bedroom for three weeks. And slowly but surely, over the course of those three weeks, I that balloon is going to deflate, right? Now take this knot out and blow up the balloon a second time to the same level. Now try to poke it with your finger. Now it's going to explode. The membrane changed in the three weeks that it was under stress. That's membrane integrity, or the lack of it. Well, this happens to neurons. This happens to other cells too.