Here's a number that surprises most people: only about 5% of adults consistently meet their daily fiber target — yet the majority believe they already eat enough. This disconnect is what researchers call the fiber gap, and it's one of the most consequential nutritional shortfalls in modern diets. Robust evidence links adequate fiber intake to lower rates of heart disease, type 2 diabetes, colorectal cancer, and obesity. In this article, a registered dietitian breaks down exactly what the fiber gap is, why it matters for your long-term health, and gives you 10 specific, whole-food strategies to hit 30 grams a day — no supplements, no dramatic overhaul required.