It’s the fat content of your diet, not the fiber, that makes you feel full. So the more fat you eat, the fuller you will feel. The problem is that fat has 9 calories per gram, compared to 4 calories per gram for protein and carbohydrate. So the more fat you eat, the more calories you eat, and the slower you will lose weight. There’s also no magic colon cancer protecton from fiber. All fiber does is help constipation. That’s it. But some patients feel better and do better eating a bit more fiber, as long as the fiber does not contain too many carbohydrates that can slow down weight loss. The most popular form of fiber for low carbohydrate dieters is GG Bran Crispbread or GG Fiber Sprinkles. Most patients can eat 3 tablespoons of Sprinkles or 5 Crispbreads a day, without significantly slowing weight loss.