Nutrition Diet: What kind of popcorn has the most fiber?
                                
                                
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                                    4 min read                                
                            
                                With approximately 3.5 grams of fiber in a three-cup serving of air-popped popcorn, this whole-grain snack is already a great source of this essential nutrient. However, a growing number of gourmet and heirloom varieties are appearing on shelves, leading many to wonder: what kind of popcorn has the most fiber? While all popcorn is a solid choice, certain varieties and preparation methods can provide a nutritional edge.