A plain-language gut-health glossary

Gut-health writing is full of jargon, and appointments move fast. This glossary gathers the terms you're most likely to run into so the rest makes more sense. Definitions here are deliberately plain and educational — they're meant to help you follow a conversation, not to diagnose anything. When a term matters for your own situation, a clinician or dietitian is the person to explain how it applies to you.

The everyday terms

• FODMAP — a group of fermentable carbohydrates (fructans, lactose, excess fructose, polyols and more) that some guts tolerate poorly.
• Motility — the movement of the digestive tract that pushes contents along; too fast or too slow both cause symptoms.
• Transit time — how long food takes to travel through the gut; loosely reflected in stool consistency.
• Flare — a stretch where symptoms intensify above your usual baseline.
• Bloating vs. distension — bloating is the feeling of pressure; distension is a visible increase in belly size.

The clinical-ish terms

• Visceral hypersensitivity — a gut that registers normal sensations as painful or uncomfortable.
• Gut microbiome — the community of bacteria and other microbes living in your digestive tract.
• IBS — irritable bowel syndrome, a symptom-based condition affecting how the gut works, diagnosed by a clinician.
• Gut–brain axis — the two-way communication between the digestive system and the nervous system.
• Elimination diet — a temporary, structured removal of foods to observe symptom changes before reintroducing them.

Terms from tracking

• Bristol Stool Chart — a 1–7 scale describing stool shape and consistency.
• Correlation window — a chosen span of time after eating used to look for possible food–symptom associations.
• Baseline — your personal normal, against which changes and flares are measured.
• Confounder — a hidden factor (stress, sleep, cycle, alcohol) that can drive symptoms and muddy apparent food links.
• Association vs. cause — a repeated pattern is an association; proving cause needs careful, controlled testing.

Using the vocabulary well

The value of shared language is precision. When you can say "Type 6 stools during a flare, with distension a few hours after meals inside my correlation window," both you and your clinician are working from the same picture. That's a world away from "my stomach's weird." Learn the words, use them to describe what you observe, and leave the interpretation — the leap from association to cause, from symptom to diagnosis — to the professionals qualified to make it.