GLOSSARY

Fiber Fermentation is microbial use of fermentable fiber with metabolite production, with gas and tolerance depending on type and dose.

Human enzymes cannot cleave all fiber linkages; some material reaches microbes and is fermented according to type. Products include short-chain fatty acids and gases, with fermentability varying between fibers. Fiber digestion is therefore not the same as starch digestion. Gradual increases and event-specific timing are generally more useful than permanently excluding every source, especially because long-term food variety and short-term gut comfort need coordinated planning.

The large intestine recovers remaining water and electrolytes, stores contents and supports elimination. Microbes ferment some nondigestible carbohydrates; fibers differ in behavior. Much nutrient uptake has already occurred in the small intestine. Adjust pre-event fiber to tolerance rather than using colonic fermentation as a reason to permanently exclude whole grains and legumes. Short-term competition convenience and long-term dietary quality serve different purposes.

For sports use, consider meal size and timing together with fluids, intensity and composition. Large, fiber-rich or fatty meals close to exercise trouble some individuals, but tolerance varies. Changing one factor during training and recording responses helps identify patterns. First-time competition products or broad food exclusions without a replacement plan do not substitute for this practical evaluation and can compromise adequate fueling.