Yes, that is a common mistake. "Knowing portion control but not following it is a bigger mistake than not knowing it." You know what is healthy, but knowledge only helps when it becomes action. For people with diabetes, eating a large portion of healthy food can still raise blood sugar. A simple life lesson: > Knowledge without action gives no results. Portion control + consistency = better health. You could use this as a short quote: "The biggest mistake is not lack of knowledge. The biggest mistake is knowing portion control and still ignoring it." Or as a title: "Portion Control: Knowing Is Not Enough, Following Is Everything."