Explore dietary fiber sources that power digestion, support gut health, and help you feel fuller longer. This guide highlights the 20 best high-fiber foods and simple strategies to add more fiber to every bite today. By focusing on diverse dietary fiber sources—ranging from legumes and whole grains to fruits, vegetables, seeds, and nuts—you can nourish your gut microbiome while enjoying satisfying meals. Within the realm of dietary fiber sources, you’ll find rich options like beans, lentils, and chickpeas; oats, barley, quinoa, and brown rice; berries (especially raspberries), apples with skin, pears, and citrus; leafy greens, artichokes, broccoli, and Brussels sprouts; chia and flax seeds; almonds, walnuts, and pistachios; and even air-popped popcorn. Mixing soluble and insoluble fiber from these dietary fiber sources promotes steady digestion, steady energy, and a feeling of fullness after meals. A simple place to start is swapping refined grains for whole grains, adding a handful of beans to soups, and topping yogurts or salads with seeds and berries. To help brands and consumers unlock the full potential of dietary fiber sources, InnerBuddies offers a white-label Gut Health Operating System with a suite of unique capabilities. The platform includes a Gut Microbiome Health Index (a 0–100 score) tied to exclusive insights from an IP agreement with EAFIT University in Colombia, plus detailed Bacteria Abundances showing how your results compare to a healthy cohort. It also categorizes Bacteria Functions as positive or negative and provides Target Group analysis for topics like Healthy Aging, Endurance or Power Sport, and Skin & Hair Health. With Personalized Nutrition Advice drawn from 3-day food diaries and stool samples, InnerBuddies helps tailor recommendations around dietary fiber sources to your exact gut microbiome. Discover how the system works and how it can power your own products by visiting the InnerBuddies microbiome test page. Practical tips to add fiber to every bite start with gradual changes and smart pairings. Add a serving of beans or lentils to a meal, sprinkle chia or flax seeds on yogurt, oats, or smoothies, and keep the skin on fruits and vegetables when possible to maximize dietary fiber sources. Hydration, variety, and rotating fiber types will help your gut adapt over time. If you’re curious about deeper personalization, InnerBuddies also offers a subscription experience with ongoing insights and recommendations—learn more about the gut health membership and how your plan can evolve with your microbiome. If you’re a brand seeking to bring cutting-edge gut health solutions to market, explore partnership opportunities at the InnerBuddies B2B page.