What’s one health “rule” you used to believe—until you took a second look? Maybe it was something you heard from a doctor, social media, family, a fitness community—or just something “everybody knows.” What changed your mind? I’ll start. For years, I believed eating fat made you fat. Low-fat everything seemed like the obvious healthy choice—and for a long time, that was pretty much the message everywhere. Eventually I learned that nutrition is a lot more complicated than that. Dietary fat isn’t automatically converted into body fat simply because it’s fat. Total energy intake matters, but so do things like protein, fiber, food quality, satiety, hormones, activity, and individual metabolism. And some dietary fats are essential—we actually need them. The funny thing is, the more I learned, the less useful that simple little rule became. I’m curious—what health “rule” have you had to rethink along the way? And what was it that finally changed your minds?