Hi Greg, It can be challenging to eat a high fiber diet while keeping potassium intake low because many sources of fiber are high in potassium (fruits, vegetables, nuts/seeds, whole grains). Rice is a lower potassium food and many gluten free products like baked goods, pasta, etc are made with rice flour. Berries, apricots, pears, peaches, pineapple, and plums are all lower potassium fruits. Broccoli, cauliflower, green beans, peppers, peas, summer squash, lettuce, kale, cucumbers, carrots, radishes, and asparagus are some vegetables that are lower in potassium. These foods might not all be significant sources of fiber, but eating a variety throughout the day can help you reach the goal of 25-35 grams. I hope that helps but feel free to message me if you have more questions!