GLOSSARY

Artificial Sweeteners and Gut Microbiome examines substance- and person-specific responses, not generalizing one sweetener to all substitutes.

Sweeteners are not one chemical group with identical responses; substance, dose and diet matter. Some human trials find individual changes, not certain harm from every product in everyone. Polyols need separate consideration from high-intensity sweeteners because of osmotic and fermentative effects. Athletes should check the actual gel or drink and training tolerance rather than judge only the sugar-free label or assume all alternatives share one microbial mechanism.

FODMAPs are short-chain carbohydrates with incomplete uptake and osmotic or fermentative effects; a high content depends on type and portion. Low-FODMAP eating targets symptoms in selected people, not universal microbiome cleansing. Initial restriction should lead to reintroduction and personalization to preserve variety and adequacy. Athletes also need sufficient fuel when considering short event-related adjustments rather than maintaining unnecessary broad restrictions indefinitely.

Inulin, oligosaccharides and resistant starches or dextrins differ in behavior. Amount, chain length and preparation influence fermentation and symptoms. Sudden increases can cause gas or discomfort, which is not a necessary sign of effectiveness. Gradual changes away from key events permit assessment. A food's long-term suitability does not mean that the same large portion immediately before running will be tolerated, so timing and quantity remain practical considerations.

Microbial responses to food, training or supplements vary between people and depend on baseline and timing within a person. Useful personalization begins with a goal, history and response assessment; one commercial report does not provide an established precise menu. Athletes should assess performance, tolerance and adequate food alongside data. Resembling a reference population alone is not success if practical outcomes or nutritional adequacy do not improve.

An association between microbes and health or performance does not alone establish microbial causation. Diet and training can influence both, and culture or animal findings are not direct human prescriptions. Sports-benefit claims need relevant human outcomes for the actual intervention. An axis name or biological pathway cannot replace evidence of a practical effect, especially when a product is marketed using results from a different population or formulation.

Bloating, diarrhea or fatigue does not identify a specific microbial cause. Record timing, food, portions, training, medicines and bowel patterns; a stool result without this history is insufficient. Severe pain, bleeding, fever or unintended weight loss needs assessment. The goal is cause identification and adequate nutrition, rather than adding several gut-health products for every symptom without evaluating response, persistence or alternative explanations.