Designs for Health PaleoFiber RS Most fiber supplements focus on motility and regularity. PaleoFiber RS is built around a different mechanism — resistant starch, a type of carbohydrate that bypasses digestion in the small intestine entirely and arrives in the large intestine intact, where it becomes fuel for the microbiome and the intestinal lining itself. The formula delivers two forms of resistant starch: organic green banana flour and organic potato starch. Both are type II resistant starches — meaning they resist enzymatic digestion in their raw, uncooked state. Once they reach the colon, beneficial bacteria ferment them into short-chain fatty acids, primarily butyrate, propionate, and acetate. Butyrate in particular is the preferred fuel source for colonocytes, the cells lining the large intestine, and plays a meaningful role in maintaining gut barrier integrity and a healthy colonic environment. Beyond gut lining support, the fermentation process also shifts colonic pH in ways that favor beneficial bacteria over pathogenic ones, contributing to microbial balance. There is also research behind resistant starch for supporting blood sugar and insulin metabolism, appetite regulation, and cardiovascular health — benefits that extend well beyond the gut. Unflavored and unsweetened, it mixes into water, smoothies, or soft foods. Start with a smaller dose and work up, as resistant starch fermentation can cause temporary bloating during adjustment. 30 servings | Vegan | Gluten-free | Dairy-free | Soy-free | Non-GMO These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent disease.